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

The United States on Friday accused China of carrying out a secret nuclear test in 2020 as the Trump administration calls for ...

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

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

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

The U.S. on Friday called for a new, broader nuclear arms control treaty with China and Russia after it accused Beijing of ...

The United States accused China of carrying out secret nuclear explosive tests in breach of an international ban.

The US has shaken a disarmament conference by charging that China carried out at least one clandestine nuclear explosive test ...

It remains to be seen whether the three big nuclear powers are headed into a new arms race, or whether President Trump is ...

A strong 5.2 quake rattling the ground near Iran’s Bushehr nuclear plant would be alarming in any week. Coming just as Washington and Tehran edge toward a direct clash over nuclear sites, it has ...

Add Yahoo as a preferred source to see more of our stories on Google. FILE - In this photo taken from video released by Russian Defense Ministry Press Service on Oct. 26, 2022, a Yars intercontinental ...

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