MOSCOW: The last remaining nuclear arms pact between Russia and the United States expired Thursday, removing any caps on the two largest atomic arsenals for the first time in more than a half-century. The termination of the New START Treaty could set the stage for what many fear could be an unconstrained nuclear arms race. Russian President Vladimir Putin last year declared readiness to stick to the treaty’s limits for another year if Washington follows suit, but US President Donald Trump has been noncommittal about extending it.

A top Kremlin official has warned that if the New START treaty expires without a replacement, the world should be alarmed that the biggest nuclear powers have no limits for the…

On September 22, 2025, Russian President Vladimir Putin affirmed Russia's readiness to abide by the treaty’s quantitative limits for an additional year beyond its scheduled…