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

Senior Russian officials on Nov. 11 said they were still waiting for a White House explanation about what President Donald Trump meant he when said he had instructed the Pentagon to resume nuclear ...

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 ...

A ghost of the Cold War is rising between the world’s superpowers, just in time for Halloween. In the wake of Russian President Vladimir Putin bragging about his country testing both a nuclear-powered ...

Resuming full testing of nuclear weapons - as President Donald Trump called for last week - would be unnecessary, costly, undermine nonproliferation efforts, and empower the nation's adversaries to ...

Senate Democrats want to curb President Donald Trump’s ability to unilaterally resume nuclear testing, as the president suggested the U.S. would do on an "equal basis" with Russia and China moving ...

The problem of defects is so big, there's even a museum of mutations at the regional medical institute back in Semey, the largest city near the old nuclear testing site. It's a small room filled with ...

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 ...