By Hans M. Kristensen

The North Korean newspaper Rodong Sinmun reportedly has issued a statement saying the U.S. has 1,000 nuclear weapons in South Korea. In this regional war of rhetoric it is important to at least get one fact right: The United States does not have nuclear weapons in South Korea. It used to – at some point close to 1,000 – but the last were withdrawn in 1991.

The only nuclear weapons the United States has in the Pacific today are the hundreds of warheads deployed on Trident II D5 sea-launched ballistic missiles on board eight Ohio-class nuclear-powered submarines patrolling in the Pacific Ocean. Some of them may be earmarked for potential use against targets in North Korea. Other weapons for bombers could be moved into the region if necessary, but they’re not today.

The North Korean obsession with the U.S. nuclear “threat” might be seen as confirmation that the nuclear deterrent works and hopefully will deter North Korea from attacking anyone. But the flip side of the coin is to what extent the U.S. nuclear posture in the Pacific – past and present – helps feed the North Korean nuclear rhetoric and perhaps even ambitions.

Additional information: A history of U.S. nuclear weapons deployment to and withdrawal from South Korea.

The final report from the Congressional Strategic Posture Commission seems focused on hedging rather than leading.

By Ivan Oelrich and Hans M. Kristensen

The Congressional Strategic Posture Commission report published today is definitely not the place that the President or the nation should look for new ideas on how to reduce the role of nuclear weapons and lead the world toward a world free of nuclear weapons.

Even for a compromise document written by a diverse group, it is a work of deeply disappointing failure of imagination.  The recommendations can be summarized as:  the nuclear world should stay pretty much the way it is but at slightly lower force levels, incrementalism is the most we can hope for, and even that should be approached very cautiously.

The report comes close to dismissing the President’s vision of a world free of nuclear weapons – and the enthusiastic support it has generated worldwide – as a utopian dream:  “The conditions that might make the elimination of nuclear weapons possible are not present today and establishing such conditions would require a fundamental transformation of the world political order.”  The United States should retain a viable nuclear deterrence “indefinitely.”  The Commission surrenders to the nuclear problems of the world rather than recommending a proactive way forward out of the mess.

Of course, the Commission is not opposed to nuclear reductions per se and supports them under certain conditions, but it recommends that the approach “balances deterrence, arms control, and non-proliferation.  Singular emphasis on one or another element,” the report says, apparently hinting at disarmament, “would reduce the nuclear security of the United States and its allies.”

If the Commission’s report is any preview of the Pentagon’s Nuclear Posture Review, we should expect minimal changes in nuclear forces, structure, or mission.  The report recommends a nuclear policy of “leading and hedging” but seems to be focused on hedging.

The Nuclear Mission and Deterrence

While President Obama believes the United States should “put an end to Cold War thinking” and “reduce the role of nuclear weapons in our national security strategy, and urge others to do the same,” the Commission offers little support for this approach or analysis of what it would mean.

Indeed, while the report concludes that, “…as long as other nations have nuclear weapons, the U.S. must continue to safeguard its security by maintaining an appropriately effective nuclear deterrent force,” the Commission fails to ask fundamental questions about what nuclear weapons are for and what their character should be.  This is probably because there was no consensus on these matters, but better to ask the question and admit they have no answer than to simply state over and over again that nuclear weapons are for “deterrence.” Since some will believe that “appropriately effective” is two thousand nuclear weapons and others think it will be twenty, what does the statement mean?

But it is also an assertion that should be, but is not, challenged.  Does this really mean that if North Korea has one nuclear bomb, intended to counter our overwhelming conventional capability, we need to have nuclear weapons to counter it?  That may be true but it is certainly not clear to us and should not be asserted as though it needs no explanation.  Elsewhere the report says the United States faces decisions about how to reduce “nuclear weapons to the absolute minimum.”  Again, two honest people could agree on this goal and differ by a factor of a hundred or a thousand on what an “absolute minimum” is.  When the United States had 32,000 nuclear weapons, that was also considered the “absolute minimum” needed for national security.

Without examination of the mission of nuclear weapons, how can we say what their characteristics should be?  Even if nuclear weapons are for deterrence, how do they deter?  What are their targets?  How should those targets be attacked?  If we do not answer, or even ask, those questions, how can we say that we need high levels of reliability?  How can we say we need land-based missiles that can be launched on a moment’s notice?  How can we say we need a vast nuclear weapons complex to design complex two-stage thermonuclear weapons with hundreds of kilotons of yield?  There are other examples as well, about reliability, safety, and so on, that presume missions for nuclear weapons that simply should not be presumed.

The Commission acknowledges that it is difficult to replicate the “relatively simple” deterrence calculus of the Cold War, determined by the damage inflicted, in today’s much more complex and fluid security environment.  Even so, the report states, the United States still “needs a spectrum of nuclear and non-nuclear force employment options and flexibility in planning along with the traditional requirements for forces that are sufficiently lethal and certain of their result to threaten an appropriate array of targets credibly.” The justification for this sweeping conclusion about capabilities is that “the security environment has grown more complex and fluid.”

As with so many discussions of nuclear weapons, the use of the term “deterrence” in particular is confused and the logic self-referencial.   Throughout the report, in too many places to cite, are repeated explicit declarations that nuclear weapons are for deterrence.  The report frequently makes the mistake of talking about nuclear weapons and deterrence and then slipping into the error of assuming that deterrence must be nuclear deterrence, or the report makes true statements about deterrence but then implies that the deterrence must be effected with nuclear weapons.  It repeatedly refers to our nuclear forces as our “deterrent” or our “deterrent forces” as though they were the same thing.  Nuclear weapon designers are maintaining their “deterrent skills.”

In describing the role of deterrence, the Commission glosses over many important developments that have shaped U.S. nuclear policy, strategy, and doctrine over the years.  “In a basic sense, the principal function of nuclear weapons has not changed in decades: deterrence. The United States has these weapons in order to create the conditions in which they are never used,” the report declares.  Yet we recall hugely important developments ranging from Mutual Assured Destruction, flexible response, adaptive planning, Global Strike, and preemptive strike options, all of which changed the policies and conditions under which the weapons might be used. The report’s more accurate statement would be: “Presidents have not changed their reluctance in decades to authorize use of nuclear weapons.”

Likewise, the report does not describe the important development after the end of the Cold War, where U.S. nuclear targeting policy expanded from Russia and China and their satellite states to deterring all forms of weapons of mass destruction use by six individual countries today (some of which do not have nuclear weapons).

Non-Use and First Strike

One of the most important conclusions in the Commission report is that the “tradition of non-use serves U.S. interests and should be reinforced by U.S. policy and capabilities.”  But what that implies for policies and capabilities is not explained.

Even so, the Commission concludes that not only must U.S. nuclear forces be able to retaliate against an attack, “the United States must also design its strategic forces with the objective of being able to limit damage from an attacker if a war begins.” Such damage-limitation capabilities “are important because of the possibility of accidental or unauthorized launches by a state or attacks by terrorists,” and can be achieved “not only by active defenses, such as missile defenses, “but also by the ability to attack forces that might yet be launched against the United States or its allies.”

Such first strike planning might be relevant with conventional forces against rogue states and terrorists, but first strike planning of course can also be used against other nuclear weapon states as it was during the Cold War against the Soviet Union and China. For the Commission to advocate such a mission for nuclear forces today, however, is deeply troubling because it is a primary reason why Russia insists it must have large numbers of nuclear weapons on alert – a dangerous posture that is a direct threat to the interest of the United States or its allies.

Extended deterrence

The Commission report echoes many of the points raised in the Schlesinger report from December last year about extended deterrence and views expressed by officials from some allies about the importance and mission of nuclear weapons.  The good news is that the Commission report makes clear that those allies are not all of the same mind concerning the requirements for extended deterrence and assurance, and that substantive and high-level consultations are needed.

But the Commission does not explain the different capabilities that contribute to extended deterrence, but instead equates “extended deterrence” with nuclear weapons and implicitly non-strategic nuclear weapons.  This after NATO for almost two decades has insisted that the U.S. non-strategic nuclear weapons deployed in Europe have no military – only a political – role.

The Commission reports that “some allies located near Russia” are saying that “U.S. non-strategic forces in Europe are essential to prevent nuclear coercion by Moscow and indeed that modernized U.S./NATO forces are essential for restoring a sense of balance in the face of Russia’s nuclear renewal.”  Yet the Commission does not say that the German foreign minister has called publicly for the withdrawal of the U.S. weapons from Europe, the Belgian Senate has unanimously called for the same, and that the overwhelming majority of Europeans want the weapons to go.

Worst-case analysis is to reference only what is a concern, but that is not the full picture.

The Influence of Russia

After nearly two decades of the Clinton and Bush administrations insisting that Russia is not an adversary and not an immediate contingency for setting U.S. nuclear force levels, the Commission at least admits that Russia largely is what drives U.S. nuclear posturing, saying, “The sizing of U.S. forces remains overwhelmingly driven by the requirements of essential equivalence and strategic stability with Russia.”

In doing so, combined with numerous other references to Russia throughout the report, the Commission essentially reinstates Russia as a central pillar in U.S. nuclear posture planning.  The report seems to accept that we are locked in an arms race with Russia and it is surprisingly cautious about how to free ourselves from it.  It even concludes that, “the United States should not abandon strategic equivalency with Russia,” because overall equivalence is important to many allies in Europe, and that the “The United States should not cede to Russia a posture of superiority in the name of deemphasizing nuclear weapons in U.S. military strategy.”

While the commission says there is no risk of such an imbalance emerging in strategic weapons in the near-term, the situation is different with non-strategic weapons.  The Commission doesn’t know how many Russia has and it can’t say how many the United States has, but while acknowledging that strict U.S.-Russian equivalence in non-strategic force numbers is unnecessary the Commission concludes that the current imbalance is stark and will become apparent as strategic weapons are reduced. This, the report correctly concludes, “points to the urgency of an arms control approach” involving non-strategic weapons.

Overall, the Commission concludes, the United States should “retain enough capacity, whether in its existing delivery systems and supply of reserve warheads or in its infrastructure, to impress upon Russian leaders the impossibility of gaining a position of nuclear supremacy over the United States by breaking out of an arms control agreement.”

Rising China

China looms in the background in many places of the report, reflecting uneasiness among the Commission members about the direction China is taking.  But how that direction relates to the U.S. nuclear posture is not analyzed well.  Even so, the Commission concludes, in addition to being able to deal with Russian and regional scenarios, the United States “should also retain a large enough force of nuclear weapons that China is not tempted to try to reach a posture of strategic equivalency with the United States or of strategic supremacy in the Asian theater.”

Curiously, the Commission is so concerned about China’s potential nuclear capacity that it urges that Russia – which it is otherwise concerned about – not reduce its nuclear forces too much.  This is a mild reversed version of the Reagan administration’s policy that sought China as a nuclear deterrence partner against the Soviet Union.

Therefore…

Based on all of these assumptions (and many more we don’t have room to mention here), the Commission lands on a conclusion that the United States should retain the Cold War nuclear force structure of the Triad.  All three legs have unique characteristics that are all needed, the Commission concludes, and because two will be left if one fails, and because “resilience and flexibility of the triad have proven valuable as the number of operationally deployed strategic nuclear weapons has declined.”

Yet the Commission could not come up with a specific force structure or a specific number for the correct size of the U.S. nuclear force, even though it was asked to do so by Congress.  The issue is too complex, the authors concluded, and really should be left to deal with by the President in consultation with the military.

The United States should reduce nuclear forces only in bi-lateral negotiations with Russia (and others later), but not pursue unilateral reductions except in reserve warheads — and only if the nuclear warhead production capacity is increased.

Conclusion

In conclusion we were greatly disappointed with the Commission’s report because we see it preoccupied with hedging and failing to offer the leading that is necessary to change status quo.

Indeed, the report seems strangely detached from the President’s vision and the widespread support it and the “gang of four” op-eds have received worldwide.

It would be ironic if the Pentagon’s Nuclear Posture Review ends up recommending bigger changes than the Commission. That shouldn’t be hard.

The task at hand is how to challenge the role of nuclear weapons, we agree with the President, not perpetuate it.

Vast inventories of nuclear weapons remain after the Cold War arms race ended.

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By Hans M. Kristensen

Russia’s nuclear forces are expected to drop well below 500 offensive strategic delivery vehicles within the next five years, less than one-third of what’s permitted by the 1991 START treaty. Unless the next U.S. Nuclear Posture Review significantly reduces the number of land-based intercontinental ballistic missiles, that single leg of the U.S. Triad of nuclear forces alone could soon include more delivery vehicles than the entire Russian strategic arsenal of land- and sea-based ballistic missiles and long-range bombers. With this in mind, Russia is MIRVing its ballistic missile to keep some level of parity with the United States.

This and more from a briefing I gave this morning at the Arms Control Association meeting Next Steps in U.S.-Russian Nuclear Arms Reductions.  I was in good company with Ambassador Linton Brooks, the former U.S. chief negotiator on the START treaty, who spoke about the key issues and challenges the START follow-on negotiators will face, and Greg Thielmann, formerly senior professional staffer of the Senate Select Committee on Intelligence, who discussed how the a new agreement might be verified through START-style verification tools.

Download: Briefing on US-Russian Nuclear Forces
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By Hans M. Kristensen

Russia’s Deputy Minister of Foreign Affairs, Sergey Ryabkov, gave a lengthy reaction to the FAS/NRDC report From Counterforce to Minimal Deterrence during a press conference Wednesday.

The transcript from the press conference shows that in response to a question that the “report [is] suggesting a possible retargeting of US missile from Russian cities to key economic facilities,” Ryabkov correctly stated: “I have read the report and think that in the Russian media the thesis mentioned by you was taken our of context. That is not the essence of the report.”

Instead, Ryabkov said correctly described that the report “contains an analysis of the hypothetical consequences of the use of nuclear weapons against large industrial and infrastructure facilities, as well as of what the losses might be in the case of the use of warheads of varying yield.” The rest of Ryabkov’s response is reproduced below:

Question: The Federation of American Scientists has published a report suggesting a possible retargeting of US missiles from Russian cities to key economic facilities. How can you comment on this? Sergey Ryabkov: I have read this report and think that in the Russian media the thesis mentioned by you was taken out of context. That is not the essence of the report. It contains an analysis of the hypothetical consequences of the use of nuclear weapons against large industrial and infrastructure facilities, as well as of what the losses might be in the case of the use of warheads of varying yield. It is deplorable and regrettable that the really existing facilities on Russian territory were chosen for such an analytical and speculative work. In my opinion, this evidences the authors’ somewhat detached attitude to the fact that much has changed in Russian-US relations in recent years. Considering Russia as a target for potential use of nuclear weapons is not a good idea. This only adds arguments to those who stick to Cold War thinking. In addition, undoubtedly, the very fact of the appearance of that report bears out our thesis that we cannot approach the question of existing potentials abstractly. Intentions, however positive and constructive today, may change tomorrow. The Federation of American Scientists is perfectly aware of this. And the very fact of the appearance of this material suggests that there needs to be serious negotiation, and that the logic of strategic equilibrium and a super-responsible approach to this sphere cannot be sacrificed to any, even the most constructive political intentions or a general favorable disposition. Intentions and dispositions are very ephemeral magnitudes, and the potentials and capacity to deal a blow, as the Association writes quite cynically and coldly about this in its report, enumerating the exponentially increasing millions of victims and speculating about how many more and what kind of warheads are needed for this knockout, are a wake-up call and a reminder to us that we live in a harsh world, whose realities can’t be disregarded.”

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If you have followed Russian news media recently, you might have gotten the impression that FAS and NRDC are in charge of U.S. nuclear strike planning and are recommending increasing nuclear targeting of Russia.

Of course, neither is true.

Yet major Russian news media – and apparently also the chairman of the Russia’s parliament’s international affairs committee – have so misread and misrepresented the FAS/NRDC study From Counterforce to Minimal Deterrence that we are compelled to publish this rebuttal.

Pravda Article Gets It Wrong

A Pravda article under the headline “U.S. retargets nuclear missiles to 12 Russian economic facilities” misrepresents the study as saying that the United States has already developed a new doctrine that is “going to retarget their nuclear missiles from large Russian cities to 12 most important economic facilities.”

The headline and first paragraph of this Pravda article misrepresent what the FAS/NRDC study From Counterforce to Minimal Deterrence actually says.

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Rather, our study does not say U.S. nuclear weapons are targeted at Russian cities. In fact, we believe cities are explicitly off-limit to U.S. nuclear strike plans unless vital military targets are present.

Nor does the study conclude it has to be 12 industrial targets.  Rather, it includes a nominal list of 12 industrial targets for illustrative purposes.

Nor does the study say the U.S. has developed or is implementing a doctrine to retarget nuclear weapons at Russia’s 12 most important economic facilities. Rather, based on U.S. government documents, which we reference in the study, we estimate that U.S. nuclear strike plans already hold at risk nuclear (and other WMD) forces, command and control facilities, military and political leadership, and war-supporting infrastructure.  What we’re proposing is to end nuclear planning against the first three of those target categories and limit the remaining effort – in a transition period toward elimination of nuclear weapons – against a sharply curtailed subset of the fourth target category.

Our correction sent to Pravda has so far been ignored.

Konstantin Kosachev Interview

Konstantin Kosachev, the chairman of the International Affairs Committee of the Russia Duma, misrepresents the FAS/NRDC report.

Duma Committee Chairman Also Gets It Wrong

In an interview with Russia Today, Konstantin Kosachev, who is chairman of the Russian parliament’s international affairs committee, said he had discussed the study with Carl Levin, chairman of the U.S. Senate Armed Services Committee, “in the presence of the U.S. ambassador to Moscow.”  Their reaction, Kosachev said, “was something like, ‘strange, we should detarget not retarget our missiles’….”

The interviewer then suggested, and Kosachev agreed, that “reports such as this” can have the effect of “scaremongering” people and “derail relations between the United States and Russia.” Kosachev added that, “This type of reports make [Russian hawks who oppose disarmament] even stronger.”

Yet the U.S. nuclear war plan already contains strike options against facilities in Russia (and other countries with WMD) – and it’s surprising if the chairman of the International Affairs Committee is not aware of this.  Russia is not an “immediate contingency,” but it’s very much a contingency because of its large numbers of nuclear weapons and history.  The recommendations in the FAS/NRDC report would not “retarget” but significantly curtail existing planning.

“Detargeting” is a controversial word that refers to the 1994 bilateral agreement between Russia and the United States (a similar arrangement was made between China and the United States) according to which the two countries pledged not to store targeting coordinates for the other country in their respective missiles.  As a result, U.S. Trident SLBMs and Peacekeeper ICBMs were said no longer to store target coordinates in their onboard computers, and the Minuteman III ICBMs, which for technical reasons had to store some coordinates, were targeted on the oceans.

The objective was to avoid an accidental launch of a missile striking the other country.  It was a symbolic “detargeting” agreement, not a constraining “nontargeting” agreement, and both countries continue to design and maintain detailed strike plans against each other.  Close to 2,000 warheads are on alert, ready to fly within minutes, despite the “detargeting” agreement.

Our report is proposing that we replace that form of planning with a much more constrained policy during the transition period where the United States and Russia figure out how to retain national security without nuclear weapons.

Vice-Chairman of Russian Council Foreign Affairs Committee Also Gets it Wrong

Vasily Likhachyov [Lykhachev], the Vice-Chairman of the Russian Council’s Foreign Affairs Committee told RIA Novosti that our proposal to go to a minimal deterrence posture represents “an infringement on the fundamental principles of international law.”  The basis for this assessment apparently was the 1994 detargeting agreement that he said Russia “strictly adheres to,” and that targeting of facilities in Russia demonstrate “disrespect for the soverignty of the Russian Federation.”

Again, the 1994 detargeting agreement is not a nontargeting agreement (see above), but it is particularly interesting if a member of the Russian Council indicates that it would be against international law if the Russian military targeted the United States with nuclear weapons.

Mr. Likhachyov also questioned our calculations of expected casualties from strikes on Russian infrastructure targets arguing that “anyone who knows what a nuclear weapon is also understands that the effect of an atomic explosion spreads over tens and even hundreds of kilometers.”

But as we explain in the report, the selection of “soft” surface targets such as industry allows the Optimum Height of Burst to be set high above the surface, thus avoiding the generation of large amounts of fallout that Mr. Likhachyov appears to assume comes from any nuclear detonation.

Resources: FAS/NRDC Press Release and Full Report

Last Wednesday, 8 April, the Federation of American Scientists and the Natural Resources Defense Council (NRDC) jointly released FAS Occasional Paper Number 7, From Counterforce to Minimal Deterrence — A New Nuclear Policy on the Path Toward Eliminating Nuclear Weapons.  As part of the release, my coauthors, Stan Norris of NRDC and Hans Kristensen of FAS, and I held a panel discussion at the Carnegie Endowment, where each of us presented results of our research that is covered in the paper.  This essay summarizes my comments on that panel.

There are three things we describe in this paper.  First, we are proposing a new set of military missions for nuclear weapons—actually the “set” is just one mission, second, we are describing what that mission would look like, and, third, we are describing one way to actually get that single mission properly implemented.
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Click on image for PDF-version of full report.

By Hans M. Kristensen

The Federation of American Scientists and Natural Resources Defense Council today published a study that calls for fundamental changes in the way the United States military plans for using nuclear weapons.

The study From Counterforce to Minimal Deterrence: A New Nuclear Policy on the Path Toward Eliminating Nuclear Weapons recommends abandoning the decades-old “counterforce” doctrine and replacing it with a new and much less ambitious targeting policy the authors call Minimal Deterrence. [Update: see Washington Post – Report Urges Updating of Nuclear Weapons Policy]

Global Security Newswire reported last week that Department of Defense officials have concluded that significant reductions to the nuclear arsenal cannot be made unless President Barack Obama scales back the nation’s strategic war plan. The FAS/NRDC report presents a plan for how to do that.

The last time outdated nuclear guidance stood in the way of nuclear cuts was in 1997, when then President Clinton had to change President Reagan’s 17-year old guidance to enable U.S. Strategic Command (STRATCOM) to go to the START-III force level that the Bush administration subsequently adopted as the Moscow Treaty force level.  The series of STRATCOM force structure studies examining lower force levels is described in The Matrix of Deterrence.

Resources: Full Report | US Nuclear Forces 2009 | United States Reaches Moscow Treaty Warhead Limit Early | Press Conference Video

New low-yield nuclear warheads for cruise missiles on Russia’s submarines?.

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By Hans M. Kristensen

Two recent news reports have drawn the attention to Russia’s tactical nuclear weapons. Earlier this week, RIA Novosti quoted Vice Admiral Oleg Burtsev, deputy head of the Russian Navy General Staff, saying that the role of tactical nuclear weapons on submarines “will play a key role in the future,” that their range and precision are gradually increasing, and that Russia “can install low-yield warheads on existing cruise missiles” with high-yield warheads.

This morning an editorial in the New York Times advocated withdrawing the “200 to 300” U.S. tactical nuclear bombs deployed in Europe “to make it much easier to challenge Russia to reduce its stockpile of at least 3,000 short-range weapons.”

Both reports compel – each in their own way – the Obama administration to address the issue of tactical nuclear weapons.

The Russian Inventory

Like the United States, Russia doesn’t say much about the status of its tactical nuclear weapons. The little we have to go by is based on what the Soviet Union used to have and how much Russian officials have said they have cut since then.

Unofficial estimates set the Soviet inventory of tactical nuclear weapons at roughly 15,000 in mid-1991. In response to unilateral cuts announced by the United States in late 1991 and early 1992, Russian President Boris Yeltsin pledged in 1992 that production of warheads for ground-launched tactical missiles, artillery shells, and mines had stopped and that all such warheads would be eliminated. He also pledged that Russia would dispose of half of all airborne and surface-to-air warheads, as well as one-third of all naval warheads.

In 2004, the Russian Foreign Ministry stated that “more than 50 percent” of these warhead types have been “liquidated.” And in September 2007, Defense Ministry official Colonel-General Vladimir Verkhovtsev gave a status report of these reductions that appeared to go beyond President Yeltsin’s pledge.

Based on this, Robert Norris and I make the following cautious estimate (to be published in the Bulletin of the Atomic Scientists in late April) of the current Russian inventory of tactical nuclear weapons:

Estimate from forthcoming Nuclear Notebook in the Bulletin of the Atomic Scientists.

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Based on the number of available nuclear-capable delivery platforms, we estimate that nearly two-thirds of these warheads are in reserve or awaiting dismantlement. The remaining approximately 2,080 warheads are operational for delivery by anti-ballistic missiles, air-defence missiles, tactical aircraft, and naval cruise missiles, depth bombs, and torpedoes. The Navy’s tactical nuclear weapons are not deployed at sea under normal circumstances but stored on land.

The Other Nuclear Powers

The United States retains a small inventory of perhaps 500 active tactical nuclear weapons. This includes an estimated 400 bombs (including 200 in Europe) and 100 Tomahawk cruise missiles (all on land). Others, perhaps 700, are in inactive storage.

France also has 60 tactical-range cruise missiles, including some on its aircraft carrier, although it calls them strategic weapons.

The United Kingdom has completely eliminated its tactical nuclear weapons, although it said until a couple of years ago that some of its strategic Trident missiles had a “sub-strategic” mission.

Information about possible Chinese tactical nuclear weapons is vague and contradictory, but might include some gravity bombs.

India, Pakistan, and Israel have some nuclear weapons that could be considered tactical (gravity bombs for fighter-bombers and, in the case of India and Pakistan, short-range ballistic missiles), but all are normally considered strategic.

Russian Nuclear-Capable Cruise Missile Launch

A nuclear-capable SS-N-19 Shipwreck cruise missile is launched from a Kirov-class nuclear-powered guided missile cruiser. The ship is equipped with 20 launchers for the SS-N-19 missile, which can carry a 500-kiloton warhead. Other tactical nuclear weapon systems include the SS-N-16 anti-submarine rocket, and the SA-N-6 anti-air missile.

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Implications and Issues

Whether Vice Admiral Burtsev’s statement is more than boasting remains to be seen, but it is a timely reminder to the Obama administration of the need to develop a plan for how to tackle the tactical nuclear weapons.

Russia’s nuclear posture is now approaching a situation where there are more tactical nuclear weapons in the inventory than strategic weapons. And NATO’s remnant of the Cold War tactical nuclear posture in Europe seems stuck in the mud of nuclear dogma and bureaucratic inaction.

None of these tactical nuclear weapons are limited or monitored by any arms control agreements, and – for all the worries about terrorists stealing nuclear weapons – are the most easy to run away with.

In April, NATO is widely expected to kick off a (long-overdue) review of its Strategic Concept from 1999. It would be a mistake to leave the initiative on what to do with the tactical nuclear weapons to the NATO bureaucrats. The vision must come from the top and President Obama needs to articulate what it is soon.

U.S. ballistic missile submarines conducted 31 nuclear deterrent patrols in 2008 at an operational tempo comparable to that of the Cold War.

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By Hans M. Kristensen [updated]

The U.S. fleet of 14 nuclear-powered ballistic missile submarines conducted 31 nuclear deterrent patrols in 2008 at an operational tempo comparable to during the Cold War.

The new patrol information, which was obtained from the U.S. Navy under the Freedom of Information Act, coincides with the completion on February 11, 2009, of the 1,000th deterrent patrol by an Ohio-class submarine since 1982.

The information shows that the United States conducts more nuclear deterrent patrols each year than Russia, France, United Kingdom and China combined.

Patrols by the Number

The 31 patrols conducted in 2008 top a 48-year history of continuous deterrent patrols. Since the USS George Washington (SSBN-598) departed Charleston, S.C., on the first nuclear-powered ballistic missile submarine (SSBN) patrol on November 15, 1960, 59 SSBNs have conducted 3,814 patrols through 2008 (see Figure 1).

Figure 1: U.S. SSBN Patrols 1960-2008

The annual number of SSBN patrols has fluctuated significantly over the years as submarines entered and left the fleet. Most patrols today occur in the Pacific Ocean. The reduction since 2000 is due to retirement of four SSBNs and lengthy modernization of four others. (click image for larger version)

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The annual number of patrols has fluctuated considerably over the years, peaking at 131 patrols in 1967. Declines occurred mainly due to retirement of SSBNs rather than changes in the mission. The retirement of the early classes of SSBNs in 1979-1981 almost eliminated patrols in the Pacific, but the new Ohio-class gradually rebuilt the posture. The stand-down of Poseidon SSBNs in October 1991 and the retirement of all non-Ohio-class SSBNs by 1993 reduced Atlantic patrols by nearly 60 percent. The patrols increased again in the second half of the 1990s and more Ohio-class SSBNs were added to the fleet, but started dropping from 2000 as four Ohio-class SSBNs were withdrawn from nuclear missions and four others underwent lengthy backfits from the Trident I C4 to the Trident II D5 Trident missile.

Figure 2: World SSBN Patrols 2008

The United States conducts more SSBN patrols than all other nuclear powers combined. China’s SSBNs have yet to conduct a deterrent patrol.

During the Cold War standoff with the Soviet Union, the vast majority of patrols were done in the Atlantic Ocean. Since the early 1990s, patrols in the Atlantic have plummeted and the SSBN force been concentrated on the west coast. The majority of U.S. SSBN patrols today occur in the Pacific.

The current number of patrols is significantly greater than the patrol levels of other countries with sea-based nuclear weapon systems. In fact, the U.S. navy conducted three times the number of SSBN patrols that the Russian navy did in 2008, and more patrols than Russia, France, Britain and China combined (see figure 2).

High Operational Tempo

Although the total annual number of SSBN patrols has decreased significantly since the end of the Cold War, the operational tempo of each submarine has not. Each Ohio-class SSBNs today conducts about the same number of patrols per year as during the Cold War, but the duration of each patrol has increased, with each submarine spending approximately 50-60 percent of its time on patrol (see Figure 3).

Figure 3: U.S. SSBN Patrol Rates 1960-2008

The operational tempo of U.S. SSBNs today is as high as it was during the Cold War. Interesting spikes occurred during the Cuban Missile Crisis and the collapse of the Soviet Union. (click image for larger version)

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The high operational tempo is made possibly by each SSBN having two crews, Blue and Gold. Each time a submarine returns from a patrol, the other crew takes over, spends a few weeks repairing and replenishing the boat, and takes the SSBN out for its next patrol.

The data also reveals a couple of interesting spikes of increased patrols in 1963/1965 and 1991. The reasons for this increased activity is not known but the periods coincide with the Cuban missile crisis and the failed coup attempt in the final days of the Soviet Union in 1991.

Another way to examine the data is to see how may patrol days each submarine and the fleet accumulate each year. During the Cold War the larger submarine fleet averaged approximately 6,000 patrol days each year, with a peak of 8,515 patrol days in 1967.  That performance declined to an average of 3,400 days in the post-Cold War era as the size of the SSBN fleet was reduced. With the removal of four SSBNs from nuclear operations and four others undergoing lengthy missile backfits, the fleet’s total patrol days has now dropped to a little over 2,200 (see figure 4).

Figure 4: U.S. SSBN Patrol Days 1960-2008

While the total SSBN fleet accumulates far less patrol days today than during the Cold War because the fleet is smaller, each submarine spends as much time on patrol as during the Cold War.. (click image for larger version)

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Yet total patrol day numbers can be deceiving because they can obscure how each submarine is doing. Because the Ohio-class SSBN design was optimized for lengthy deterrent patrols, the average number of days each submarine spends on patrol has been higher in the post-Cold War period than during the Cold War itself. Patrols can be shortened by technical problems, but many Ohio-class submarines today stay on patrol for more than 80 days. Last year, the USS Maine (SSBN-741) conducted a 98-day patrol in the Pacific.

What is a Deterrent Patrol?

An SSBN deterrent patrol is an extended operational deployment during part of which the submarine covers its assigned target package in support of the strategic war plan. Each Ohio-class patrol typically lasts 60-90 days, but one submarine in late 2008 conducted an extended patrol of 98 day and patrols have occasionally exceeded 100 days. Occasionally a patrol is cut short by technical problems, in which case another SSBN can be deployed on short notice. As a result, patrols today in average last about 72 days.

Being on patrol does not mean the submarine is continuously submerged on-station and holding targets at risk. In fact, when the submarine is not on Hard Alert holding targets at risk in Russia, China, or regional states, much of the patrol time is spent on cruising between homeport, patrol areas, exercising with other naval forces, undergoing inspections and certifications, performing Weapon System Readiness Tests (WSRTs), conducting retargeting exercises, and Command and Control exercises.

Another activity involves so-called SCOOP exercises (SSBN Continuity of Operations Program) where the SSBN will practice replenishment or refit in forward ports in case the homeport is annihilated in wartime. In the Pacific, the SCOOP ports include Pearl Harbor, Hawaii (see Figure 5), Guam, Seaward, Alaska, Astoria, Oregon, and San Diego, California. In the Atlantic they include Port Canaveral and Mayport, Florida, Roosevelt Roads, Puerto Rico, and Halifax, Canada. The SSBN may even return to its homeport and redeploy a day or two later on the same patrol.

Figure 5: SSBN Replenishment at Forward Location

USS Henry M. Jackson (SSBN-730) loading fresh fruit in Pearl Harbor during a SCOOP visit to Hawaii in March 2008 on its first patrol after a four-year overhaul where it was refueled and modernized to carry the Trident II D5 ballistic missile.

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Although patrols normally end at the base where they started, this is not always the case. An SSBN that departs Naval Submarine Base Bangor, Washington, might go on-station for several weeks in alert operational areas, conduct various training and exercises, and then arrive at Pearl Harbor in Hawaii. After a brief port visit and replenishment the submarine typically resumes its patrol and eventually returns to Bangor. But sometimes the patrol will end in Hawaii, a new crew be flown in to replace the old, and the submarine undergo refit at the forward location as part of a SCOOP exercise. The SSBN then departs Hawaii on a new patrol, goes on-station in alert operational areas, conducts more exercises and inspections, and eventually returns to Bangor where the new patrol ends.

This type of broken up patrol where the submarine is allowed to do more than on-station operations is sometimes described as “modified alert” and said to be different from the Cold War. But SSBNs have never been on-station all the time, with most deployed submarines being in transit between on-station alert areas and other non-alert operations. In fact, “modified alert” patrols date back to the early 1970s.

Of the 14 SSBNs currently in the fleet, two are normally in overhaul at any given time. Of the remaining operational 12 submarines, 8-9 are deployed on patrol at any given time. Four of these (two in each ocean) are on “Hard Alert” while the 4-5 non-alert SSBNs can be brought to alert level within a relatively short time if necessary. One to three SSBNs are in refit at the home base in preparation for their next patrol.

The SSBNs on Hard Alert continuously hold at risk facilities in Russia, China and regional states with an estimated 384 nuclear warheads on 96 Trident II D5 missiles that can be launched within “a few minutes” after receiving the launch order. The targets in the “target packages” are selected based on the taskings of the strategic war plan, known today as Operations Plan (OPLAN) 8010.

What is the Mission?

But why, nearly two decades after the Cold War ended, are 28 crews ordered to sail 14 SSBNs with more than 1,000 nuclear warheads on 30-plus patrols each year at an operational tempo comparable to that of the Cold War?

The official line is, as stated last month by Secretary of the Navy Donald Winter during the celebration of the 1,000th Ohio-class deterrent patrol, that “the ability of our Trident fleet to [be ready to launch its missiles] 24 hours a day, seven days a week, 365 days a year, has promoted the interests of peace and freedom around the world….Since the beginning of the nuclear age, the world has seen a drastic reduction in wartime deaths.”

Figure 6: Chilton and Roughead

STRATCOM commander General Kevin Chilton (left) and Chief of Naval Operations Admiral Gary Roughead. General Chilton says SSBNs deter not only nuclear conflict but “conflict in general” and are “as equally important today, as they ever were during the height of the Cold War.”

The warfighters add more nuances, including Commander Jeff Grimes of the Trident submarine USS Maryland (SSBN-738) who at the start of a recent deterrent patrol explained it to Navy Times: “There are nuclear weapons in the world today. Many nations have them. Proliferation is possible in the growing technologies societies have. The power of the deterrent is the knowledge that the capability exists in the hands of controlled people. So on a global scale, deterrence is showing how it’s working every day. We haven’t had a global, world war, in a long time,” he said. “Intelligence is different, the threats are different, so we do adjust the planning and contingencies for strategic operations continually to face the threats that may or may not be seen….We’re there on the front line, ready to go,” Grimes declared.

STRATCOM commander General Kevin Chilton, who in a war would advise the president on which nuclear strike options to use, said recently that although some people thought the Trident mission would end with the 1991 collapse of the Soviet Union, the SSBNs “are as equally important today, as they ever were during the height of the Cold War….The application of deterrence can actually be more complicated in the 21st century, but some fundamentals don’t change,” he said and added: “And it is not just to deter nuclear conflict. These forces have served to deter conflict in general, writ large, since they’ve been fielded.”

These are strong and diverse claims that are also made in some of the command histories that each SSBN produces. Some of them state that the mission is to “maintain world peace,” which has certainly not been the case in the post-Cold War era. Others describe the mission as “providing strategic deterrence to prevent nuclear war” (my emphasis), which sounds more credible. But even in that case, can we really tell whether it is the SSBNs that prevent nuclear war and not the ICBMs or bombers?

The enormous differences between maintaining world peace, preventing wars, and preventing nuclear war demand that officials articulate the SSBN mission much more clearly. To that end, it would be good to hear why it takes 12 operational SSBNs with more than 1,100 nuclear warheads on 30-plus patrols per year to deter nuclear attack against the United States, but only three operational SSBNs with less than 160 warheads on six patrols per year to safeguard the United Kingdom.

Figure 7: USS Maryland (SSBN-738) Underway on Nuclear Deterrent Patrol

USS Maryland (SSBN-738) departs Kings Bay on February 15, 2009, for its 53rd deterrent patrol in the Atlantic Ocean to prevent nuclear war, prevent world war, deter conflict, maintain world peace, promote the interests of peace of freedom, deter proliferators, in a mission that remains“equally important…as during the height of the Cold War,” depending on who is describing it.

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Last year Russia’s SSBNs returned to sea at a level not seen in a decade and it plans to build eight new Borey-class SSBNs with new multi-warhead missiles. France is completing its fourth Triomphant-class SSBNs also with a new multi-warhead missile, and Britain has announced plans to build four new SSBNs. China is building 3-5 new Jin-class SSBNs with 8000-kilometer missiles, and India is said to be working on an SSBN as well. The U.S. Navy has also begun design work on its next ballistic missile submarine to replace the Ohio-class.

In short, the nuclear powers seem to be recommitting themselves to an era of deploying large numbers of nuclear weapons in the oceans. Most people tend to view sea-based nuclear weapons as the most legitimate leg of the Triad. Yet of all strategic nuclear weapons, sea-based ballistic missiles are the most difficult to track, the most problematic to communicate with in a crisis, the hardest to verify in an arms control agreement, and the only ones that can sneak up on an adversary in a surprise attack.

If the Obama administration wants to decisively move the world toward “dramatic reductions” and ultimately the elimination of nuclear weapons, then it must seek answers to these issues. In the short term, it needs to ask whether the Cold War operational tempo of U.S. SSBNs is counterproductive by sending a signal to other nuclear weapon states that triggers modernization of their forces and makes reductions harder to achieve than otherwise. In other words, what is the net impact of the SSBN patrols on U.S. national security objectives in an era of pursuing nuclear disarmament?

Addition Resources: Russian Sub Patrols | Chinese Sub Patrols
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The Chinese military harassment of a U.S. submarine surveillance vessel Sunday occurred only 75 miles from China’s growing naval base near Yulin on Hainan Island.

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By Hans M. Kristensen [updated 1:50 P.M., 3/10/09]

The incident that unfolded in the South China Sea Sunday, where the U.S. Navy says five Chinese ships harassed the U.S. submarine surveillance vessel USNS Impeccable, appears to be part of a wider and dangerous cat and mouse game between U.S. and Chinese submarines and their hunters.

News media reports cite Pentagon reports of half a dozen other incidents just within the past week in which U.S. surveillance vessels were “subjected to aggressive behavior, including dozens of fly-bys by Chinese Y-12 maritime surveillance aircraft.”

The latest incident allegedly occurred in international waters only 75 miles south of a budding naval base near Yulin on Hainan Island from where China has started operating new nuclear attack and ballistic missile submarines. The U.S. Navy on its part is busy collecting data on the submarines and seafloor to improve its ability to detect the submarines in peacetime and more efficiently hunt them in case of war.

USNS Impeccable (T-AGOS-23)

The USNS Impeccable was designed specifically as a platform for the SURTASS towed array and its Low Frequency Array upgrade.

An Impeccable “Civilian Crew”

The U.S. Navy’s description of the incident states that “a civilian crew mans the ship, which operates under the auspices of the Military Sealift Command.” Yet as one of five ocean surveillance ships, the USNS Impeccable (T-AGOS 23) has the important military mission of using its array of both passive and active low frequency sonar arrays to detect and track submarines. The USNS Impeccable works directly with the Navy’s fleets, and in 2007 operated with the three-carrier strike battle group in Valiant Shield 07 exercise in the Western Pacific.

USNS Impeccable is equipped with the Surveillance Towed Array Sensor System (SURTASS), a passive linear underwater surveillance array attached to a tow cable. SURTASS was developed as a floating submarine detection system for deep waters, and the Navy wants to add an active Low Frequency Array (LFA) to improve long-range detection of submarines in shallow waters.

SURTASS LFA Deployment

The SURTASS LFA passive-active surveillance system is designed to detect submarines and surface ships at long range in deep and shallow waters.

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Indeed, according to the U.S. Navy, the USNS Impeccable is “designed specifically as a platform for the SURTASS towed array and its LFA adjunct.”

New Chinese Nuclear Submarines at Yulin Naval Base

Among Chinese submarines the USNS Impeccable was monitoring is probably the Shang-class (Type-093) nuclear-powered attack submarine, a new class China is building to replace the old Han-class, and which has recently been seen at the Yulin base.

A commercial satellite image taken September 15, 2008, shows two Shang-class submarines present at the base, the first time – to my knowledge – that two Shang-class SSNs have been seen at the base at the same time.

Shang-Class Submarines at Yulin Naval Base September 2008

Two new Shang-class (Type-093) were photographed at the naval base near Yulin on Hainan Island in mid-September 2008, the first time two Shang-class SSNs are known to have been present at the same time.

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An earlier image from February 2008 showed a Jin-class (Type-094) ballistic missile submarine at the Hainan base for the first time. The Jin-class is not visible on the later image. China has been reducing its submarine fleet by replacing old boats with fewer modern ones. The submarines normally stay close to shore, but in 2008 sailed on 12 longer patrols – twice as many as in 2007.

Time For an Incident Agreement

The incident begs the question who or at what level in the Chinese government the harassment in international waters was ordered. The incident will make life harder for those in the Obama administration who want to ease the military pressure on U.S.-Chinese relations, and easier for hardliners to argue their case.

For both countries the Sunday incident and the many other incidents that have occurred recently are reminders that the time is long overdue for an agreement to regulate military operations. Following a break in response to U.S. military sales to Taiwan, U.S.-Chinese mid-level military-to-military talks were scheduled to resume last month, and the Commander of U.S. Pacific Command, Admiral Timothy Keating, said “nascent initiatives” were underway to draw up some “rules of the road” to address some of these issues.

Absent a substantial agreement, building on the 1998 US-Chinese Military Maritime Safety Agreement (which already includes discussions on “interpretation of the Rules of the Nautical Road and avoidance of accidents-at-sea”) and the 1972 US-Russian Incidents at Sea Agreement, incidents like the USNS Impeccable incident will continue as a serious irritant and source of mistrust between China and the United States, a situation neither country nor other nations in the region can afford.

Additional resources: US-Chinese Military Maritime Safety Agreement (1998) | US-Russian Incidents at Sea Agreement (1972) | Secrecy News Blog: U.S., China, and Incidents at Sea

Russian SSBN patrols tripled from 2007 to 2008.

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By Hans M. Kristensen

Russia sent more nuclear-armed ballistic missile submarines on patrol in 2008 than in any other year since 1998, according to information obtained by Federation of American Scientists from U.S. naval intelligence.

The information shows that Russian missile submarine conducted ten patrols in 2008, compared with three in 2007 and five in 2006. In 2002, no patrols were conducted at all.

Return of Continuous Russian SSBN Patrols?

For the past ten years, Russian remaining 11 SSBNs have not maintained continuous patrols, but instead carried out occasional patrols for training purposes. Defense Minister Sergei Ivanov said in on September 11, 2006, that five SSBNs were on patrol at that time. But since that number matched the total number of patrols conducted that year, it revealed a cluster of patrols rather than a continuous at-sea presence.

The United States, France and Britain, in contrast, continuously have at least one SSBN on patrol. In the case of the United States, two-thirds of its 14 SSBNs are at sea at any given time, of which four are on alert.

Figure 1: Russian Submarine Patrols 1981-2008

Russian SSBNs conducted 10 patrols in 2008, the most since 1998. Attack submarines conducted seven patrols, the same as in 2007. Click on image for large graph.

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The ten Russian patrols in 2008 raise the question whether Russia has now resumed continuous SSBN patrols. Neither the duration nor the dates of Russian SSBN patrols are known, but if they east last more than 36 days and do not overlap, then Russia could have a continuous at-sea deterrent. If the patrols cluster like in 2006, then the posture might still be sporadic.

The Voyage of Ryazan

Although not specified in the information obtained from U.S. naval intelligence, one of the Russian patrols probably was the 30-days under-ice voyage of the Delta III-class submarine Ryazan from the Northern Fleet on the Kola Peninsula in the Barents Sea to the Pacific Fleet on the Kamchatka Peninsula in the Pacific.

Figure 2: Delta III SSBN Navigating Icy Waters

One of the 10 SSBN patrols probably involved the transfer of a Delta III SSBN from the Northern Fleet to the Pacific Fleet.

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The voyage occurred shortly after Ryazan completed a successful test launch of a ballistic missile – probably an SS-N-18 – from the Barents Sea on August 1, 2008. The missile type was not announced, which is unusual, but its payload flew across Northern Russia and impacted in the Kura test range on the Kamchatka Peninsula.

At end the of August, Ryazan departed the Northern Fleet and sailed submerged along Russia’s ice covered northern coast through the Bering Strait before it headed south to the ballistic missile submarine base in Vladivostok, where it arrived on September 30.

Arms Control Implications

It would be ironic – now that the Obama administration has proposed reductions in strategic nuclear forces and Kremlin seems to respond favorably – if Russian SSBNs returned to the Cold War practice of continuous deterrent patrols.

SSBNs continuously roaming the oceans are one of the last symbols of the Cold War when long-range nuclear missiles were hidden in the deep to survive a massive first strike. United States SSBNs continue a patrol rate comparable to that of the 1980s, France and Britain try to keep one or two at sea at any time – two apparently collided last month, and China and India are trying to build SSBNs fleets too.

Many still see SSBNs as purely retaliatory weapons passively hiding in the oceans. But as U.S. and Russian nuclear forces are reduced further and China and India join the SSBS club, forward deployed submerged nuclear weapons could become some of the most problematic challenges for nuclear arms control.

B83 thermonuclear bombs are offloaded from a C-17 aircraft for storage in preparation for meeting the limit of the Moscow Treaty three and a half years early.

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By Hans M. Kristensen

The United States has reduced its deployed strategic warheads to the maximum number allowed under 2002 Moscow Treaty, three and a half years early.

As of today, a total of 2,200 strategic warheads are deployed on ballistic missiles and at long-range bomber bases. The reduction was initially planned to be met in 2012, then 2010, but was achieved a few days ago.

The information is described in the forthcoming “Nuclear Notebook: U.S. Nuclear Forces, 2009,” which I co-author with Robert Norris from Natural Resources Defense Council. The article will be published in the Bulletin of the Atomic Scientists later this month.

Warhead Number Confusion

We obtained the information from the U.S. government. While the number of operationally deployed strategic warheads is not classified the total number of weapons in the U.S. inventory is a closely held secret. The government also keeps secret how many warheads are held in reserve as well as the number of warheads dismantled each year.

As a result, there is considerable confusion in the public about the size and categories of U.S. nuclear weapons. One recent Associated Press report, for example, said the “American stockpile is believed to be about 2,300,” a number that is now being repeated by news media across the globe.

The stockpile number is not correct. Norris and I estimate that the U.S. “stockpile” currently includes approximately 5,200 warheads, of which only about half are deployed. This includes about 2,200 strategic and 500 tactical warheads (including 200 in Europe). Moreover, an additional roughly 4,200 intact warheads are no longer in the DOD Stockpile but awaiting dismantlement. All included, the United States is estimated to possess approximately 9,400 warheads in all categories (see table).

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The “operationally deployed strategic warheads” is a special counting rule the United States uses under the Moscow Treaty. It does not count hundreds of warheads in storage at the Navy’s two missile submarine bases and the Air Forces’ three ballistic missile bases. Russia, which does not use this counting rule and does not release its warhead count, is estimated to have approximately 2,700 operational strategic warheads.

Reductions But What Kind?

The “real” numbers are important at a time when the United States and Russia are discussing if and how to extend the 1991 START agreement, which expires later this year, and whether to reduce further the number of nuclear warheads.

The news media has recently reported that the Obama administration might seek to cut the “stockpile” by 80 percent, and quoted an anonymous official saying “nobody would be surprised if the number reduced to the 1,000 mark for the post-Start treaty.”

It matters a great deal whether the cut will be of the total stockpile or just the “operationally deployed strategic warheads.” An 80 percent cut in the 5,200-warhead stockpile corresponds to approximately 1,000 warheads. A reduction of the START number limit (6,000 warheads) by 80 percent would leave about 1,200 warheads. Cutting the SORT limit (2,200 warheads) to 1,000 would be a reduction of about 54 percent.

If the total stockpile were reduced to 1,000 warheads, only a portion of them would presumably be deployed. Using the current ratio (52 percent) that would mean only 520 of the 1,000 warheads would be deployed with the balance in reserve. The entire ICBM force today carries about 520 warheads, but it is doubtful that a Triad could be justified with so few operational warheads. There are some hard choices ahead about which leg to cut.