The Department of Energy issued twenty “declassification determinations” between April 2011 and March 2015 to remove certain specified categories of nuclear weapons-related information from classification controls. “The fact that a mass of 52.5 kg of U-235 is sufficient for a gun-assembled weapon” was formally declassified in a written decision dated August 19, 2014. The “total […]
Updated below In 2013, the Academy of Military Sciences of the People’s Liberation Army of China issued a revised edition of its authoritative, influential publication “The Science of Military Strategy” (SMS) for the first time since 2001. “Each new edition of the SMS is closely scrutinized by China hands in the West for the valuable […]
By Hans M. Kristensen Two suspected terrorists arrested by the Italian police allegedly were planning an attack against the nuclear weapons base at Ghedi. The base stores 20 US B61 nuclear bombs earmarked for delivery by Italian PA-200 Tornado fighter-bombers in war. Nuclear security and strike exercises were conducted at the base in 2014. During […]
By Muhammad Umar, On July 14, 2015, after more than a decade of negotiations to ensure Iran only use its nuclear program for peaceful purposes, Iran and the P5+1 (US, UK, Russia, China, France + Germany) have finally agreed on a nuclear deal aimed at preventing Iran from developing nuclear weapons. Iran has essentially agreed to […]
Since the early 1980s, the world has known that a large nuclear war could cause severe global environmental effects, including dramatic cooling of surface temperatures, declines in precipitation, and increased ultraviolet radiation. The term nuclear winter was coined specifically to refer to cooling that result in winter-like temperatures occurring year-round. Regardless of whether such temperatures […]
Here is some news from recent research in neuroscience that, I think, is relevant for FAS’s mission to prevent global catastrophes. Psychologists Dacher Keltner of the University of California, Berkeley, and Jonathan Haidt of New York University, have argued that feelings of awe can motivate people to work cooperatively to improve the collective good.1Awe can […]
Editor’s note: The following is a compilation of letters by Dr. William Higinbotham, a nuclear physicist who worked on the first nuclear bomb and served as the first chairman of FAS. His daughter, Julie Schletter, assembled these accounts of Higinbotham’s distinguished career. Thank you for this opportunity to share with you my father’s firsthand accounts […]
Nuclear forensics is playing an increasing role in the conceptualization of U.S. deterrence strategy, formally integrated into policy in the 2006 National Strategy on Combatting Terrorism (NSCT). This policy linked terrorist groups and state sponsors in terms of retaliation, and called for the development of “rapid identification of the source and perpetrator of an attack,” […]
This chronology lists selected external publications and briefings by the staff of the Nuclear Information Project. External links might go dead over time; if you need assistance to locate missing items, please contact individual project staff via the “About” page. To search for publications on the FAS Strategic Security Blog, see our Publications page. 2023 […]
By Hans M. Kristensen The biggest surprise in the Pentagon’s latest annual report on Chinese military power is the claim that China’s ICBM force now includes the “multiple independently-targetable re-entry vehicle (MIRV)-equipped Mod 3 (DF-5).” This is (to my knowledge) the first time the US Intelligence Community has made a public claim that China has […]
By Hans M. Kristensen In a speech to the Review Conference of the Non-Proliferation Treaty in New York earlier today, U.S. Secretary of State John Kerry disclosed new information about the size of the U.S. nuclear weapons stockpile. Updated Stockpile Numbers First, Kerry updated the DOD nuclear stockpile history by declaring that the stockpile as of […]
By Hans M. Kristensen Is China increasing production of nuclear ballistic missile submarines? Over the past few months, several US defense and intelligence officials have stated for the record that China is planning to build significantly more nuclear-powered missile submarines than previously assumed. This would potentially put a bigger portion of China’s nuclear arsenal out […]