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

The Soviet Union built the largest nuclear bomb ever — but at the last moment, its power was cut in half, turning it into one of the "cleanest" bombs in history. Here’s why Tsar Bomba was never ...

The 80th anniversary of the atomic bombing of Hiroshima and Nagasaki is this week. It was the only time nuclear warheads were used during war. Here’s a look at the history and current U.S. stockpile.