Add Yahoo as a preferred source to see more of our stories on Google. President Donald Trump's order late Wednesday night for the U.S. to resume nuclear weapons tests has confounded officials and ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. A mushroom cloud rises from a test blast at the Nevada Test Site on June 24, 1957. | U.S. Energy Department via AP President ...

Scientific knowledge about the damaging effects of nuclear-weapons testing helped to end such tests. Those findings haven’t changed.

A U.S. official focusing on arms control has provided what he called new, declassified details of a Chinese underground nuclear test nearly six years ago.

VIENNA (AP) — The United States and Russia have both recently threatened to resume nuclear testing, alarming the international community and jeopardizing a global norm against such tests. Experts say ...

The president wants to resume nuclear testing. Senator Edward Markey asks, “Is he a warmonger or just an idiot?’ It would be a mistake of radioactive proportions to resume nuclear testing. None of the ...

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 ...

While on his way to meet with Chinese President Xi Jinping for trade negotiations, U.S. President Donald Trump posted a short statement on Oct. 29 that appeared to suggest the United States would ...