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 ...

The testing of nuclear weapons is suddenly a major topic of discussion after being largely dormant for three decades. Last week, Russia tested a nuclear-powered missile, but did not detonate an actual ...

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 ...

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

The United States has not conducted a nuclear weapons test since 1992, and thus there was widespread surprise when President Trump indicated, shortly before a meeting with China’s Xi Jinping, that he ...

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 ...

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 ...

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 ...

Donald Trump’s command for the United States to resume nuclear weapons testing will not include explosive tests, for now, according to Energy Secretary Chris Wright. Wright, whose agency oversees the ...