The allegations were leveled by U.S. officials late last week. Arms control experts worry that norms against nuclear testing ...

It remains to be seen whether the three big nuclear powers are headed into a new arms race, or whether President Trump is trying to spur negotiations on a new accord now that a last Cold War treaty ...

China is on course to have more than 1,000 nuclear warheads in the next few years, according to U.S. intelligence estimates.

Work is progressing fast just outside Kemmerer at TerraPower’s first-of-its-kind nuclear power project. Cowboy State Daily ...

A top arms diplomat at the State Department recently laid out what might come next as Washington upends decades of federal policies on nuclear proliferation.

A U.S. official suggested in recent comments that Beijing conducted a test back in the summer of 2020. So why is the Trump ...

More than six decades later, the 1961 nuclear test still stands as a milestone in military history. Learn how it reshaped ...

The Rulison test — conducted at a depth of 8,425 feet — was the deepest subterranean nuclear-bomb detonation conducted in U.S. history.

The episode, if true, illustrates how ambiguity in one state's nuclear behaviour can reverberate across regions ...

In 1963, President John F. Kennedy kicked off a decades-long effort to reduce the risk of nuclear war, when he signed the ...

Warning at an appearance in Las Vegas that the world is “less safe” without a binding nuclear pact, two key House Democrats ...