For decades, the idea of saving Earth from an incoming asteroid with nuclear weapons lived mostly in popcorn cinema, a ...

In October 1961, the Soviet Union detonated the Tsar Bomba, a nuclear weapon with a yield of 50 megatons. The explosion was the largest man-made blast in history, producing a fireball nearly five ...

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.