Hans M. Kristensen

Recent Activity from Hans M. Kristensen

Chinese Nuclear Missile Upgrade Near Dalian

By Hans M. Kristensen One of the last Chinese Second Artillery brigades with the old liquid-fuel DF-3A intermediate-range nuclear ballistic missile appears to have been upgraded to the newer DF-21 road-mobile, dual-capable, medium-range ballistic missile. A new satellite image posted on Google Earth from May 4, 2014, reveals major changes to what appears to be a launch unit site for the Dengshahe brigade northeast of Dalian by the Yellow Sea. The upgrade apparently marks the […]

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Nuclear Exercises Amidst Ukrainian Crisis: Time For Cooler Heads

By Hans M. Kristensen Less than a week after Russia carried out a nuclear strike exercise, the United States has begun its own annual nuclear strike exercise. The exercises conducted by the world’s two largest nuclear-armed states come in the midst of the Ukraine crisis, as NATO and Russia appear to slide back down into a tit-for-tat posturing not seen since the Cold War. Military posturing in Russia and NATO threaten to worsen the crisis and […]

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Russian ICBM Force Modernization: Arms Control Please!

By Hans M. Kristensen In our Nuclear Notebook on Russian nuclear forces from March this year, Robert S. Norris and I described the significant upgrade that’s underway in Russia’s force of land-based intercontinental ballistic missiles (ICBMs). Over the next decade, all Soviet-era ICBMs will be retired and replaced with a smaller force consisting of mainly five variants of one missile: the SS-27. After more than a decade-and-a-half of introduction, the number of SS-27s now makes […]

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Nuclear Modernization Briefings at the NPT Conference in New York

By Hans M. Kristensen Last week I was in New York to brief two panels at the Third Session of the Preparatory Committee for the 2015 Review Conference of the Parties to the Treaty on the Non-Proliferation of Nuclear Weapons (phew). The first panel was on “Current Status of Rebuilding and Modernizing the United States Warheads and Nuclear Weapons Complex,” an NGO side event organized on May 1st by the Alliance for Nuclear Accountability and […]

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US Nuclear Weapons Stockpile Number Declassified: Only 309 Warheads Cut By Obama Administration

By Hans M. Kristensen After a transparency hiatus of four years, the Obama administration has declassified the size of its nuclear weapons stockpile: 4,804 warheads as of September 2013. The new stockpile size is 309 warheads fewer than the 5,113 warheads that the administration in 2010 reported were in the stockpile as of September 2009. The new number of 4,804 warheads is 154 warheads more than Norris and I have in our latest Nuclear Notebook, […]

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China SSBN Fleet Getting Ready – But For What?

By Hans M. Kristensen China’s emerging fleet of 3-4 new Jin-class nuclear-powered ballistic missile submarines is getting ready to deploy on deterrent patrols, “probably before the end of 2014,” according to U.S. Pacific Command. A new satellite image taken in October 2013 (above) shows a Jin SSBN in dry dock at the Bohai shipyard in Huludao. Two of the submarine’s 12 missile tubes are open. It is unclear if the submarine in the picture is […]

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The B61 Family of Nuclear Bombs

By Hans M. Kristensen Robert Norris and I have made an update to our Nuclear Notebook on the B61 nuclear bomb family. Kind of an arcane title but that cozy-feeling title is what the nuclear weapon designers call that half a dozen different types of B61 nuclear weapons that were derived from the original design. And it’s kind of timely, because the Obama administration is about to give birth to the newest member of the […]

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B61-12 Nuclear Bomb Design Features

By Hans M. Kristensen Additional design details of the new B61-12 guided standoff nuclear bomb are emerging with new images. The image above shows a full-scale B61-12 model hanging in a wind tunnel at Arnold Air Force Base. The test “uncovered a previously uncharacterized physical phenomenon,” according to Sandia National Laboratories, that would affect weapons performance. Apparently a reference to the interaction between weapons spin rocket motors and the new guided tail kit assembly. Existing B61 […]

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Obama Administration Decision Weakens New START Implementation

By Hans M. Kristensen After four years of internal deliberations, the U.S. Air Force has decided to empty 50 Minuteman III ICBMs from 50 of the nation’s 450 ICBM silos. Instead of destroying the empty silos, however, they will be kept “warm” to allow reloading the missiles in the future if necessary. The decision to retain the silos rather than destroy them is in sharp contrast to the destruction of 100 empty silos currently underway at […]

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New START Data Show Russian Increase, US Decrease Of Deployed Warheads

By Hans M. Kristensen The latest aggregate data released by the US State Department for the New START treaty show that Russia has increased its counted deployed strategic nuclear forces over the past six months. The data show that Russia increased its deployed launchers by 25 from 473 to 498, and the warheads attributed to those launchers increased by 112 from 1,400 to 1,512 compared with the previous count in September 2013. During the same […]

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