President Trump ordered the Pentagon to resume nuclear testing “immediately,” ending a moratorium that has been in place ...

Let the new nuclear arms race begin -- again. No one but North Korea is testing nuclear weapons, but a little voice is telling Trump everyone but the U.S. is testing them.

North Korean leader Kim Jong Un, whom Trump tried and failed to connect with during his tour in Asia, also tested strategic ...

Since the late 1990s, nuclear-weapon states, with the exception of North Korea, have not tested nuclear weapons ...

Experts say there are roughly 12,241 nuclear weapons across the world, with just over 9,600 thought to be operational.

President Donald Trump has suggested the U.S. will restart nuclear weapons testing, a move that upends decades of American ...

Fox News contributor Michael Pillsbury joins 'America's Newsroom' to weigh in on President Donald Trump's meeting with President Xi Jinping and the U.S. resuming nuclear testing as other countries ...

Russia said it tested a nuclear-powered cruise missile and torpedo, two of its experimental weapons, in recent days.

President Donald Trump has ordered testing of American nuclear weapons to start "immediately," due to testing by Russia and ...

President Donald Trump landed back in the United States Thursday after a surprise directive to begin nuclear weapons testing that raised the specter of renewed superpower tensions.Trump also claimed ...

BUSAN, South Korea (AP) — President Donald Trump appeared to suggest the U.S. will resume testing nuclear weapons for the ...

Critics warned that even underground testing carries huge risks to the public while accelerating a dangerous arms race.