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

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

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

The allegation comes as the White House pushes Beijing to agree to new nuclear talks after the New Start arms-control deal ...

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.

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 ...

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

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 ...

President Donald Trump is confused. Just moments before he was to meet with China’s President Xi Jinping, he posted a baffling message on his Truth Social site, claiming the U.S. would “immediately” ...

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

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 ...

With doomsday nuclear weapons the last remnant of Russia's superpower status, President Vladimir Putin is stepping up threats to use them against Western powers aiding Ukraine. (Photo by Alexander ...