Iranian scientists and nuclear experts made a second covert visit to Russia last year, in what the US claims has been a push ...

The quiet expansion of Beijing’s remote nuclear weapons complex, Lop Nur, points to years of preparation for a potential ...

US President Donald Trump and Russian President Vladimir Putin have spent weeks trading threats to restart nuclear tests, an ...

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

Should the U.S. and Russia resume nuclear testing? The answer to that question must be a resounding “No.” Yet President ...

Trump's comments last month sparked fears of a new nuclear arms race and concerns major powers would restart full testing.

Trump’s message at the end of last month is that the U.S. is no longer willing to ignore obvious dangers, especially if China ...

Putin orders nuclear test preparations after Trump announces U.S. will resume testing. Russia vows proportionate response to American nuclear program moves.

Rep. Dina Titus delivers a forceful warning in Congress, calling the Biden administration’s move to resume U.S. nuclear ...

Senate Democrats push back against Trump's nuclear testing plans with new legislation requiring congressional approval for ...

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

Russia urged the United States on Friday to clarify what it called contradictory signals about a resumption of nuclear ...