Kim Jong Un oversaw a new solid-fuel rocket engine test, state media reports, as North Korea pushes to upgrade its long-range ...

Trump's announcement on restarting US nuclear testing has raised more questions than it's answered.Andrew Harnik/Getty Images More has come out on President Donald Trump's plans for nuclear testing, ...

Add Yahoo as a preferred source to see more of our stories on Google. An unarmed intercontinental ballistic missile launches during an operational test at Vandenberg Air Force Base, California, in ...

By Jonathan Landay WASHINGTON, March 26 (Reuters) - The Navy admiral tapped as the new head of U.S. nuclear forces on ...

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, March 24 (Reuters) - A senior State Department official on Tuesday said that the U.S. still is assessing how to implement President Donald Trump's order to resume U.S. nuclear weapons ...

The United Nations took a swipe at President Donald Trump for saying the United States will start “testing our nuclear weapons,” a move that provoked global uncertainty and international outcry. “We ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Resuming full testing of nuclear weapons — as President Donald Trump called for last week — would be unnecessary, costly, ...

Nov. 6 (UPI) --President Donald Trump's calls to ramp up nuclear weapons testing last week have put nuclear watchdogs and world leaders on alert while experts say the United States has little to gain.

The Navy admiral who ‌commands U.S. nuclear forces on Thursday endorsed a finding by the Energy Department and Pentagon that ...