Nuclear weapons haven’t been tested in the United States since 1992. Find out why, and what could happen if the hiatus ends.

As the cloud cleared, Air Force bombers dropped in to gather air samples. Researchers hoped that the radioactive fallout ...

VIENNA (AP) — In the wake of U.S. President Donald Trump’s suggestion earlier this year that the U.S. would resume nuclear testing, a U.S. government representative defended the stance at a global ...

The world passed a nuclear milestone this week. And, perhaps surprisingly given the recent run of saber-rattling from the likes of Russia and the United States, it’s a positive one.

WASHINGTON, Nov 25 (Reuters) - Democratic U.S. Senator Edward Markey on Tuesday urged President Donald Trump not to resume explosive nuclear weapons testing, saying that doing so could spur rival ...

WEST PALM BEACH, Fla. (AP) — 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 ...

WASHINGTON — Democratic senators representing states that bore the brunt of the fallout from explosive nuclear weapons testing are seeking to pass legislation that would bar President Donald Trump ...

President Donald Trump said this week that he wants the Defense Department to begin testing nuclear weapons "immediately," but experts say that's wishful thinking. The U.S. has only one location where ...

Numerous pundits and opinion pieces suggested that Trump’s Venezuela raid would send a welcome signal to Russia and China: ...

President Donald Trump has called for the United States to test its nuclear weapons for the first time in three decades. But Trump’s statements about testing — in particular, whether other nations are ...

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