A U.S. official focusing on arms control has provided what he called new, declassified details of a Chinese underground ...

US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one covert explosive test in recent years as part of a broader push to ...

President Donald Trump’s call for the United States to resume testing of nuclear weapons last week has experts scratching their heads. What did he really mean – exploding a warhead or testing delivery ...

Scientific knowledge about the damaging effects of nuclear-weapons testing helped to end such tests. Those findings haven’t changed.

The United States is “immediately” restarting nuclear weapons testing, President Donald Trump has said. “Because of other countries’ testing programs, I have instructed the Department of War to start ...

When the countdown hit zero on September 23, 1992, the desert surface puffed up into the air, as if a giant balloon had inflated it from below. It wasn’t a balloon. Scientists had exploded a nuclear ...

President Donald Trump's comments Thursday suggesting the United States will restart its testing of nuclear weapons upends decades of American policy in regards to the bomb, but come as Washington's ...

President Trump's Truth Social announcement that the US will pursue new nuclear weapons testing raises more questions than it answers.

A US Army HIMARS launches a GMLRS round during Exercise ‘Eager Lion' in Jordan in 2017. (US Army/Sgt 1st Class Steven Queen) Lockheed Martin Australia (LMA) and Thales Australia have tested Guided ...