New START expired on February 5, ending decades of U.S.-Russia cooperation to reduce each country’s nuclear weapons on alert.

Beijing urged the U.S. and Russia to act soon, saying the global nuclear order was on the line.

Nuclear weapons are not going to suddenly disappear. But they might create a more dangerous world in which countries are ...

The last major nuclear arms treaty between the US and Russia just expired. Some experts believe a combination of satellite ...

Experts warn that the expiration of a long-standing nuclear arms control treaty between the two superpowers could mark the ...

Beijing, Moscow and shaken American allies are seeking new warheads as President Trump ends more than a half century of ...

Nuclear weapons are often discussed in abstractions, as if they were just another line item in a defense budget or a ...

The post-war international order may be tearing apart at the seams and international law is increasingly looking like a polite fiction, but we did just pass one notable milestone of global peace and ...

The National Nuclear Security Administration (NNSA) is celebrating “a significant milestone,” announcing that it completed a record number of key element extractions integral to nuclear weapons ...

Resuming full testing of nuclear weapons — as President Donald Trump called for last week — would be unnecessary, costly, undermine nonproliferation efforts, and empower the nation’s adversaries to ...