As Iran’s nuclear program advances, the critical question of whether Tehran would need to conduct nuclear tests to ensure its weapons are effective looms over the consciousness of the international ...

The Tsar Bomba's explosion was unparalleled in power. With a 50 megaton capacity, this nuclear test was estimated to be 3,800 times the strength of the Hiroshima atomic bomb. And although short video ...

Trump’s pick to lead the U.S. nuclear weapons agency faced Senate questions over workforce cuts, morale issues and the future of nuclear weapons testing.

The National Nuclear Security Administration said development for a bomb 24 times more powerful than the one dropped on Hiroshima is ahead of schedule.

Scripps News takes you inside a California lab that is ensuring the effectiveness of the United States' nuclear weapons - ...

Kim Yo Jong, the influential sister and potential successor to North Korea's Supreme Leader Kim Jong Un, has warned U.S.

SEOUL, April 9 (Reuters) - North Korea's status as a nuclear weapons state can never be reversed, no matter how much the ...

Milestone marks critical step forward in deployment of world's first mass-produced reactor ...