In 1954, the United States detonated Castle Bravo at Bikini Atoll expecting a far smaller blast, but the weapon exploded with a 15-megaton yield and became the largest nuclear test in U.S. history.

MAJURO, MARSHALL ISLANDS — Lemeyo Abon learned about snow from the movies played on projectors by visiting American sailors. But living on Rongelap — a remote tropical atoll in the central Pacific ...

Hydronuclear experiments, barred globally since the 1990s, may lie behind President Trump’s call last month for the United States to resume its testing of nuclear bombs. By William J. Broad President ...

President Donald Trump raised questions Wednesday night about a decades-old U.S. prohibition on testing its nuclear weapons by detonating them, a prospect which experts say is dangerous to populations ...

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 ...

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 ...