New START, the last bilateral nuclear arms control treaty between the United States and Russia, will expire in February 2026 if Washington and Moscow do not reach an understanding on its extension—as they have signaled they are interested to do. What would the end of New START mean for U.S.-Russia relations and the arms control architecture that had for decades contributed to stability among great powers?

Lawfare Public Service Fellow Ariane Tabatabai sits down with John Drennan, Robert A. Belfer International Affairs Fellow in European Security, at the Council on Foreign Relations, and Matthew Sharp, Fellow at MIT’s Center for Nuclear Security Policy, to discuss what New START is, the implications of its expiration, and where the arms control regime might go from here.

For further reading, see:

• “Putin’s Nuclear Offer: How to Navigate a New START Extension,” by John Drennan and Erin D. Dumbacher, Council on Foreign Relations
• “No New START: Renewing the U.S.-Russian Deal Won’t Solve Today’s Nuclear Dilemmas,” by Eric S. Edelman and Franklin C. Miller, Foreign Affairs
• “2024 Report to Congress on Implementation of the New START Treaty,” from the Bureau of Arms Control, Deterrence, and Stability, U.S. Department of State

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