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

The US accused China of secret nuclear tests, banned under international agreement, that were building toward tests of larger ...

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

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.

Beijing has been accused of conducting secret nuclear explosion tests and attempting to disguise its violation of a global prohibition treaty.

The U.S.' top arms control official confirmed a Chinese nuclear test first suspected in 2020.

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. U.S. Secretary of Energy Chris Wright comments on the National Nuclear Security Administration furloughing 1,400 federal workers ...

Donald Trump has trampled on another taboo, and it’s a good thing. The president said in a Truth Social post that the United States will begin “immediately” testing our “Nuclear Weapons” on “an equal ...

Energy Secretary Chris Wright on Sunday clarified that the new nuclear weapons tests ordered by President Donald Trump will not include nuclear detonations — despite Trump’s recent social media post ...

For the first time since the end of the Cold War, European capitals are discussing how to develop their own deterrent.

Scientists at Los Alamos National Laboratory say neutrinos could be used as a diagnostic ...