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.

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

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 ...

China almost certainly shook neighbouring Kazakhstan with an underground nuclear weapons test, according to a senior American official. Seismic activity detected in Kazakhstan on June 22, 2020 appeared to stem from such a test rather than a natural earthquake,