State Department alleges China conducted nuclear test in 2020, reigniting debate over U.S. testing moratorium and international arms control challenges.

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

Confusion and ambiguity are dangerous in nuclear brinksmanship. President Donald Trump spread both on Wednesday when he posted on Truth Social an error-filled and unclear order for the U.S. to “immediately” resume nuclear weapons tests. Trump’s message was sent just before his meeting with Chinese President Xi Jinping in Busan, South Korea.

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 has expired.

DUBAI, United Arab Emirates (AP) — President Donald Trump’s comments Thursday suggesting the United States will restart its testing of nuclear weapons upends decades of American policy in regards to the bomb, but come as Washington’s rivals have been ...

WEST PALM BEACH, Fla. (AP) — New tests of the U.S. nuclear weapons system ordered up by President Donald Trump will not include nuclear explosions, Energy Secretary Chris Wright said Sunday. It was the first clarity from the Trump administration since ...

President Donald Trump ordered the Department of War to resume testing nuclear weapons “on an equal basis” with Russia and China on Thursday, a practice halted by the U.S. in 1992. The announcement gave rise to fears of the revived possibility of ...