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 ...

There is more fallout from a Russian missile strike in northeastern Ukraine that killed dozens of civilians on Palm Sunday.

Imagine the power of the bomb dropped on Hiroshima in 1945 and then multiply it by 670,000 times. Terrifying doesn't really ...

The decades-long struggle to find a permanent place to dispose of nuclear waste will continue, probably for many years to ...

President Donald Trump's pick to lead the National Nuclear Security Administration (NNSA) says he will oppose resuming ...

Khamenei refuses to capitulate to U.S. threats. The time for diplomatic engagement may be over.

America's modernization of its nuclear weapons is running ahead of schedule. The National Nuclear Security Administration ...

Iranian Foreign Minister Abbas Araqchi says upcoming talks with the U.S. could guarantee results but "wall of mistrust" ...