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P-5

Delegation members from the UN Security Council's five permanent members (P5), from left to right: Philip Barton of Britain, Andrea Thompson of the United States, Nicolas Roche of France, Fu Cong of China, and Oleg Rozhkov of Russia, attend a panel discussion after the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing in January 2019. Photo by Thomas Peter/AFP via Getty Images.

All START: a proposal for moving beyond US-Russia arms control

By Amy J. Nelson, Michael O’Hanlon | Analysis, Nuclear Weapons

Watch the 2025 Doomsday Clock announcement on January 28