Next month it will have been 80 years since the Japanese cities of Hiroshima and Nagasaki were devastated by nuclear attacks.

National Nuclear Security Administration to finish the First Production Unit of the B61-13, a modern variant of the B61 nuclear gravity bomb, this fiscal year.

A terrifying new simulation reveals what really happens when a nuclear bomb detonates—and the truth is more horrifying than ...

Fears around World War 3 breaking out remain high and an expert has outlined what Americans should do should a nuclear bomb ...

How an atomic weapon is built, and what the recent Israeli and U.S. attacks on Iran may mean for the country’s nuclear ambitions.

Nine countries currently either say they have nuclear weapons or are believed to possess them. The five original nuclear ...

But they could also start a nuclear war. A U.S. attack on Iran might bring surrender. ... Iran does not have to create a modern, sophisticated warhead that could fit on the tip of a missile.

Amid the ongoing missile attacks between Israel and Iran, we get the facts on the number of nuclear warheads in the world.

The White House says Iran has all it needed to produce a nuclear weapon in "a couple of weeks" once given the go-ahead from ...