Director, Nuclear Information Project
Hans Kristensen
Status of Worldwide Nuclear Arsenals,
U.S. Nuclear Policy De-alerting,
Nuclear Weapons

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.

publications
Nuclear Weapons
Report
Nuclear Notebook: Pakistan Nuclear Weapons, 2023

The FAS Nuclear Notebook is one of the most widely sourced reference materials worldwide for reliable information about the status of nuclear weapons and has been published in the Bulletin of the Atomic Scientists since 1987. The Nuclear Notebook is researched and written by the staff of the Federation of American Scientists’ Nuclear Information Project: Director Hans […]

09.14.23 | 1 min read
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Nuclear Weapons
Blog
Increasing Evidence that the US Air Force’s Nuclear Mission May Be Returning to UK Soil

New U.S. Air Force budgetary documents strongly imply that the United States Air Force is in the process of re-establishing its nuclear weapons mission on UK soil.

08.28.23 | 4 min read
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Nuclear Weapons
Blog
While Advocating Nuclear Transparency Abroad, Biden Administration Limits It At Home

Earlier this spring, the Department of Defense and Department of Energy twice rejected requests from the Federation of American Scientists to declassify the number of nuclear weapons in the US stockpile and the number of nuclear weapons awaiting dismantlement.

07.31.23 | 5 min read
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Nuclear Weapons
Blog
Belarus’ “Nuclear-Capable” Iskanders Get A New Garage

The Belarusian military has completed what appears to be a new garage facility for the allegedly nuclear-capable Iskander missile launchers it received from Russia.

07.27.23 | 2 min read
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Nuclear Weapons
Report
Nuclear Notebook: French Nuclear Weapons, 2023

The FAS Nuclear Notebook is one of the most widely sourced reference materials worldwide for reliable information about the status of nuclear weapons and has been published in the Bulletin of the Atomic Scientists since 1987. The Nuclear Notebook is researched and written by the staff of the Federation of American Scientists’ Nuclear Information Project: Director Hans […]

07.19.23 | 1 min read
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Nuclear Weapons
Blog
Does Russia Have Nuclear Landmines?

Recent U.S. Intelligence reports refer repeatedly to the existence of Russian nuclear landmines, although it is uncertain how operational they are.

07.17.23 | 6 min read
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Nuclear Weapons
Blog
Russian Nuclear Weapons Deployment Plans in Belarus: Is There Visual Confirmation?

New satellite images show that the construction of a double-fenced security perimeter is underway at a weapons depot near the town of Asipovichy in central Belarus.

06.30.23 | 7 min read
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Nuclear Weapons
Report
Nuclear Notebook: Russian Nuclear Weapons, 2023

The FAS Nuclear Notebook is one of the most widely sourced reference materials worldwide for reliable information about the status of nuclear weapons, and has been published in the Bulletin of the Atomic Scientists since 1987. The Nuclear Notebook is researched and written by the staff of the Federation of American Scientists’ Nuclear Information Project: Director Hans […]

05.08.23 | 1 min read
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Nuclear Weapons
Blog
Video Indicates that Lida Air Base Might Get Russian “Nuclear Sharing” Mission in Belarus

On 14 April 2023, the Belarusian Ministry of Defence released a short video of a Su-25 pilot explaining his new role in delivering “special [nuclear] munitions” following his training in Russia. The features seen in the video, as well as several other open-source clues, suggest that Lida Air Base––located only 40 kilometers from the Lithuanian border and the […]

04.19.23 | 7 min read
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Nuclear Weapons
Blog
Was There a U.S. Nuclear Weapons Accident At a Dutch Air Base? [no, it was training, see update below]

A photo in a Los Alamos National Laboratory (LANL) student briefing from 2022 shows four people inspecting what appears to be a damaged B61 nuclear bomb.

04.03.23 | 7 min read
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Nuclear Weapons
Blog
STRATCOM Says China Has More ICBM Launchers Than The United States – We Have Questions

In early-February 2023, the Wall Street Journal reported that U.S. Strategic Command (STRATCOM) had informed Congress that China now has more launchers for Intercontinental Ballistic Missiles (ICBMs) than the United States. The report is the latest in a serious of revelations over the past four years about China’s growing nuclear weapons arsenal and the deepening […]

02.10.23 | 6 min read
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Nuclear Weapons
Blog
The C-17A Has Been Cleared To Transport B61-12 Nuclear Bomb To Europe

The C-17As of the 62nd Airlift Wing at Joint Base Lewis-McChord serve as the Prime Nuclear Airlift Force (PNAF), the only airlift wing that is authorized to transport the Air Force’s nuclear warheads.

01.09.23 | 3 min read
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