It remains to be seen whether the three big nuclear powers are headed into a new arms race, or whether President Trump is ...

The extraordinary claim, if true, would mark the first nuclear test of the 21st century by any country other than North Korea ...

US Wields Nuclear Test Claim To Press China On Arms Control. A disputed Chinese nuclear test has become the latest stress ...

A strong 5.2 quake rattling the ground near Iran’s Bushehr nuclear plant would be alarming in any week. Coming just as Washington and Tehran edge toward a direct clash over nuclear sites, it has ...

The US accused China of secret nuclear tests, banned under international agreement, that were building toward tests of larger ...

Add Yahoo as a preferred source to see more of our stories on Google. U.S. President Donald Trump looks on as he speaks to members of the media aboard Air Force One as he departs for Florida from ...

Trump administration considers deploying additional nuclear weapons and possibly resuming underground nuclear testing following the expiration of the last major US-Russia arms control treaty, a report ...

Hours before meeting President Xi Jinping of China on Thursday, President Trump made a confounding proclamation: He wanted the Pentagon to “start testing our nuclear weapons on an equal basis” with ...

Confusion and ambiguity are dangerous in nuclear brinksmanship. President Donald Trump spread both on Wednesday when he ...

President Donald Trump says the U.S. plans to restart nuclear weapons testing for the first time in more than 30 years, a move experts fear could raise global tensions and disrupt the nuclear balance ...

America’s last nuclear detonation was nothing special. Smaller than the bomb that killed 73,000 people in Nagasaki, it exploded 1,397 feet below the Nevada desert. It shook the ground, created a ...

The Rulison test — conducted at a depth of 8,425 feet — was the deepest subterranean nuclear-bomb detonation conducted in U.S. history.