WEST PALM BEACH, Fla. — 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 the ...

In 1954, scientists and military personnel gathered at Bikini Atoll to witness Castle Bravo, the first test in a major series of thermonuclear experiments conducted during the early Cold War. The ...

Donald Trump has repeatedly called the proliferation of nuclear weapons “the n-word,” his way of warning that speaking “nuclear” into existence puts the world on the path of mutually assured ...

SEOUL, South Korea (AP) — North Korea said it conducted a “higher level” nuclear test explosion on Friday that will allow it to finally build an array of stronger, smaller and lighter nuclear weapons.

In a particularly heated moment from his first term, Trump taunted North Korea’s Kim Jong Un — whose 2017 underground test is the last known example of explosive nuclear testing — for the relative ...

VIENNA (AP) — The head of the U.N. nuclear test ban treaty organization says arch-enemies Iran and Israel are “the closest” of the eight holdout nations to ratifying the treaty and assuring the world ...

President Trump said on Thursday that the U.S. would begin testing nuclear weapons again for the first time in decades. "We've halted many years ago, but with others doing testing I think it's ...