Russian officials say they are waiting for an explanation from President Donald Trump about nuclear testing. He hasn't given ...

Sandia National Laboratories said in a Thursday release that it, along with the National Nuclear Security Administration, ...

President Trump has argued the U.S. should test nuclear weapons because other countries are doing it. But scientific data suggest they’re not.

Marco Rubio told reporters Wednesday that nuclear testing plans are "on par with what other countries are doing." ...

Trump's announcement breaks with more than three decades of policy. The last time the United States tested a nuclear weapon was in 1992.

Experts agreed if the U.S. resumed full nuclear weapons tests, other nations would do the same — giving them a chance to ...

Experts say there are roughly 12,241 nuclear weapons across the world, with just over 9,600 thought to be operational.

Energy Secretary says administration will tests nuclear weapons ‘systems’ without detonating devices — for now ...

Trump ordered the U.S. military to resume nuclear weapons testing. Why were they stopped and why restart now? What to know.

President Donald Trump’s recent social media post about his intention for the United States to resume nuclear weapons testing ...

Trump announced late Thursday that he had ordered the Pentagon to begin testing nuclear weapons on an “equal basis” with Russia and China. The move would mark the first time the United States would ...