In the five days since the last remaining nuclear treaty between the United States and Russia expired, statements by administration officials have made two things clear: Washington is actively ...

Add Yahoo as a preferred source to see more of our stories on Google. The US said it has intelligence that China conducted banned nuclear explosive tests. The nuclear monitoring organization said it ...

A senior State Department official on Tuesday said the U.S. still is assessing how to implement President Donald Trump's ...

GENEVA (AP) — A U.S. official focusing on arms control on Monday provided what he called new, declassified details of a Chinese underground nuclear test nearly six years ago and urged countries to ...

WASHINGTON, Feb 17 (Reuters) - A senior U.S. official on Tuesday revealed what he said were new details of an underground nuclear test blast that China allegedly conducted in June 2020. Assistant ...

President Donald Trump issued a directive in October to conduct nuclear weapons tests.

Nuclear weapons tests are among the most violent events humans can trigger, and that violence leaves fingerprints in the Earth, sea, air, and even in orbit. The physics of shock waves, sound, and ...

VIENNA (AP) — In the wake of U.S. President Donald Trump’s suggestion earlier this year that the U.S. would resume nuclear testing, a U.S. government representative defended the stance at a global ...

The State Department’s allegation that China conducted a yield-producing nuclear test in 2020 is reigniting debate in Washington over whether the United States can continue its decades-long moratorium ...

Last week, NPR and other news outlets aired a story about a possible nuclear test conducted in China. Assistant Secretary of State Christopher Yeaw alleged that China had conducted a clandestine ...