Nuclear Issues

CSIS’s Project on Nuclear Issues analyze nuclear policy issues including deterrence, escalation, and arms control, and is the leading network of nuclear policy professionals.

Photo: VADYM BIELIKOV/AFP via Getty Images

Photo: VADYM BIELIKOV/AFP via Getty Images

We Need More Off-Ramps for Nuclear Crises

States should develop off-ramps—such as crisis communications, third-party mediation, and narrative manipulation—now and in advance of crises in order to reduce the risk of nuclear use.

Commentary by Heather Williams and Nicholas Adamopoulos — May 12, 2025

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Williams

Heather Williams

Director, Project on Nuclear Issues and Senior Fellow, Defense and Security Department
Victor Cha

Victor Cha

President, Geopolitics and Foreign Policy Department and Korea Chair
Joseph Rodgers

Joseph Rodgers

Deputy Director and Fellow, Project on Nuclear Issues

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Why Does the United States Need a More Flexible Nuclear Force?

Deterrence is emerging as a theme for Secretary of Defense Pete Hegseth, but questions remain about the Trump administration’s ability to deliver and maintain the nation’s nuclear deterrent.

Critical Questions by Heather Williams and Lachlan MacKenzie — April 3, 2025

CSIS European Trilateral Track 2 Nuclear Dialogues

Political shifts and a rapidly changing security environment continue to reinforce the importance of close collaboration and unity between the United States, the United Kingdom, and France as responsible nuclear weapons states and NATO alliance members.

Report by Heather Williams — April 1, 2025

Europe's Nuclear Future

Please join the CSIS Defense and Security Department for a conversation on the future of European rearmament, nuclear deterrence, and transatlantic relations.

Event — March 11, 2025

Can France and the United Kingdom Replace the U.S. Nuclear Umbrella?

As doubts grow over U.S. nuclear commitments, Germany’s new chancellor has sparked debate on whether France and the United Kingdom could provide a European nuclear umbrella. But with strategic and doctrinal hurdles ahead, is Europe ready to reshape its nuclear deterrence?

Critical Questions by Astrid Chevreuil and Doreen Horschig — March 4, 2025

Fueling the Future: Recommendations for Strengthening U.S. Uranium Security

While the United States led global uranium production from 1953 to the 1980s, this dominance has declined over time. Currently, dependence on foreign adversaries for uranium poses a significant risk to U.S. nuclear supply chains, impacting both energy and defense.

Brief by Gracelin Baskaran and Meredith Schwartz — February 5, 2025

PONI Live Debate: AI Integration in NC3

Join PONI on January 24, 2025, for a live debate between ASP senior associate Sarah Mineiro and CNAS executive vice president and director of studies Paul Scharre on AI integration in NC3. 

Event — January 24, 2025

PONI Live Debate: AI Integration in NC3

The CSIS Project on Nuclear Issues hosted a live debate between ASP senior associate Sarah Mineiro and CNAS executive vice president and director of studies Paul Scharre on AI integration in NC3.

Transcript — January 24, 2025