The blinding burst of light from a nuclear detonation follows, yet it quickly fades into an unexpectedly small mushroom cloud ...

The Tsar Bomba's explosion was unparalleled in power. With a 50 megaton capacity, this nuclear test was estimated to be 3,800 ...

LIVERMORE, Calif. (WPVI) -- What was once highly classified can now be found on YouTube-- and this isn't a leak. The Lawrence Livermore National Lab is beginning to publish thousands of films of U.S.

The photos, he says, are part scientific study and part propaganda, a measure of America’s technological progress and the power of its arsenal. They are also, in a way the Pentagon likely never ...

Growing up in Salt Lake City, Utah, in the 1950s and 60s, Mary Dickson was among the millions of American schoolchildren taught to “duck and cover” in the event of a nuclear war. “I just remember ...

(Corrections & Clarifications: This story previously misstated how far nuclear fallout from the government's atomic tests reached. Fallout from the initial Trinity Test reached 46 of the 48 contiguous ...