A nuclear blast is often imagined as a single instant of destruction. In reality, for many farther from the explosion, danger would unfold over hours and days as fallout traveled with wind and weather ...

These US states would be the most at risk if there were a nuclear attack on missile silos in America's heartland ...

Uncle Sam conducted several pointless and destructive experiments on his own people during the Cold War. The most infamous was MKUltra, the CIA's project to develop procedures for mind control using ...

Add Yahoo as a preferred source to see more of our stories on Google. Photo: Naval Radiological Defense Laboratory; Fang family San Francisco Examiner photograph archive. Creative Commons Attribution ...