Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald ...

China almost certainly shook neighbouring Kazakhstan with an underground nuclear weapons test, according to a senior American ...

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

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

The U.S. government revealed new intelligence on Tuesday suggesting China may have conducted an ...

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

Add Yahoo as a preferred source to see more of our stories on Google. Donald Trump’s command for the United States to resume nuclear weapons testing will not include explosive tests, for now, ...

Hours before meeting President Xi Jinping of China on Thursday, President Trump made a confounding proclamation: He wanted the Pentagon to “start testing our nuclear weapons on an equal basis” with ...

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

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 ...

President Trump's comments about restarting weapons tests are not likely to lead to mushroom-cloud explosions over the New Mexico desert or seismic shaking underground in Nevada, according to the ...