Iran said it was suspending cooperation with the U.N. atomic agency, denying international inspectors the chance to assess ...

The New START Treaty, extended until February 4, 2026, includes specific provisions for verifying strategic offensive weapons, including heavy bombers capable of carrying nuclear payloads.

It left the U.S. without the diplomatic bench to negotiate a replacement for New START, the last major arms control treaty capping U.S. and Russian arsenals. It expires on Feb. 4, 2026.

Once New START expires, the United States also needs to let go of the Cold War assumptions that underpin it. With the sole exception of the 1987 Intermediate-Range Nuclear Forces Treaty, every ...

To date, the only NPT accessor state to have withdrawn from the treaty is North Korea, which did so in 2003, citing concerns over an impending U.S. preemptive strike.