The expiration of the last nuclear treaty between Russia and the U.S. threatens a new arms race, potentially involving China.

The last significant nuclear-arms-control treaty is about to expire, and Trump isn’t putting anything in its place.

As the final nuclear treaty between the U.S. and Russia nears expiration, fears of a renewed arms race grow. Both nations face the possibility of expanding their arsenals without constraints, while ...

Russia warns the world is just “days” away from losing the last guardrails on the planet’s two largest nuclear arsenals.

Russia says it is prepared to evacuate hundreds of its nuclear staff from Iran’s Bushehr power plant if the regional crisis ...