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Kristensen,  Hans M. 

Full Name:  Kristensen,  Hans M. 
Program Name: Nuclear Weapons
Title: Director, Nuclear Information Project
Phone Number: (202) 546-3300
Fax: (202) 675-1010
Email: hkristensen (at)


Hans M. Kristensen is director of the Nuclear Information Project at the Federation of American Scientists where he provides the public with analysis and background information about the status of nuclear forces and the role of nuclear weapons. He specializes in using the Freedom of Information Act (FOIA) in his research and is a frequent consultant to and is widely referenced in the news media on the role and status of nuclear weapons.

His collaboration with researchers at NRDC in 2010 resulted in an estimate of the size of the U.S. nuclear weapons stockpile that was only 13 weapons off the actual number declassified by the U.S. government.

Kristensen is co-author of the Nuclear Notebook column in the Bulletin of the Atomic Scientists and the World Nuclear Forces overview in the SIPRI Yearbook. The Nuclear Notebook is, according to the publisher, “widely regarded as the most accurate source of information on nuclear weapons and weapons facilities available to the public.” Past Nuclear Notebook columns can be found here. A full listing of Kristensen's publications can be found here. 

Between 2002 and 2005, Kristensen was a consultant to the nuclear program at the Natural Resources Defense Council in Washington, D.C, where he researched nuclear weapons issues and wrote the report “U.S. Nuclear Weapons In Europe” (February 2005) and co-authored numerous articles including “What’s Behind Bush’s Nuclear Cuts” (Arms Control Today, October 2004) and “The Protection Paradox” (Bulletin of the Atomic Scientists, March/April 2004). Between 1998 and 2002, Kristensen directed the Nuclear Strategy Project at the Nautilus Institute in Berkeley, CA, and he was a Special Advisor to the Danish Ministry of Defense in 1997-1998 as a member of the Danish Defense Commission. He was a Senior Researcher with the Nuclear Information Unit of Greenpeace International in Washington D.C from 1991 to 1996, prior to which he coordinated the Greenpeace Nuclear Free Seas Campaign in Denmark, Norway, Finland and Sweden.


Blog: Strategic Security Blog

Hans M. Kristensen and Robert S. Norris, "Nuclear Warhead Stockpiles And Transparency," in Global Fissile Material Report 2013: Increasing Transparency Of Nuclear Warhead And Fissile Material Stocks As A Step Toward Disarmament (International Panel on Fissile Materials, December 2013), pp. 50-58.
2013 September: Arms Control Today, "Falling Short Of Prague: Obama's Nuclear Weapons Employment Policy"
2013 February: United Nations Institute for Disarmament Research, "Reducing Alert Rates Of Nuclear Weapons"
2012 December 14: FAS Special Report, "Trimming Nuclear Excess: Options for Further Reductions of U.S. and Russian Nuclear Forces"
2012 May 3: FAS Special Report, "Non-Strategic Nuclear Weapons"
2011 August 10: Bulletin of the Atomic Scientists"A Presidential Policy Directive for a New Nuclear Path"
2009: FAS Special Report, "From Counterforce To Minimal Deterrence"
2008: FAS Report, "Toward True Security"
2006: FAS Special Report, "Chinese Nuclear Forces And U.S. Nuclear War Planning" 


2014 March 24: Center for Arms Control and Non-Proliferation, "Previewing The Air Force Nuclear Missileer Investigation"
2013 September 25: Georgetown University School of Foreign Service, "The U.S. Nuclear Posture After The 2010 Nuclear Posture Review And 2013 Nuclear Employment Strategy"
2013 May 30: Women's Action For New Direction, "B61-12: America's New Guided Standoff Nuclear Bomb", briefing recording available on YouTube here. 
2013 May 10: Air Force Strike Command At Barksdale Air Force Base, "Deterrence And Assurance: Reassessing The Nuclear Posture"
2013 February 27: Center For Strategic And International Studies, "Unilateral Versus Bilateral Nuclear Reductions"
2012 September 24: Woodrow Wilson School of Public and International Affairs at Princeton University, "China's Nuclear Forces And Potential Vulnerabilities: Potential Implications For Posture And Strategy"
2012 August 10: University of California San Diego, "U.S. Nuclear Strategy After The 2010 Nuclear Posture Review"
2012 August 9: USSTRATCOM Deterrence Symposium, "Will Advanced Conventional Capabilities Undermine Or Enhance Deterrence?"
2012 February 15: Fourth Nuclear Deterrence Summit, "Perspectives on the 2013 Budget Request and President Obama’s Guidance on the Future of the U.S. Nuclear Weapons Program"
2012 January 20: Arms Control Association, "The Future of the U.S. Nuclear Arsenal: Issues and Policy Options" 


In the News:
Nuclear Information Project in the News -  List of News Clips

FAS in the NewsComplete list of News Clips



2011 August 9: Australian Broadcast Corporation (ABC) Radio - Late Night Live, "Global Nuclear Update"


2011 August 5: Australian Broadcast Corporation (ABC), "One Plus One Friday" (program) 
2011 July 1: CNN, "Could Terrorists Take Pakistan Nukes?"
2011 June 29: CNN,"Iran Testing Potential Nuke Missiles?"