A Weapon Beyond Imagination In October 1961, the Soviet Union detonated a bomb so powerful that its shock waves circled ...

The explosion yielded an energy equivalent of 10 megatons of TNT, an amount roughly 1,000 times as large as that released by the Hiroshima bomb Also see: As time silences Hiroshima, Nagasaki ...

It was the only time nuclear warheads were used during war. Here’s a look at the history and current U.S. stockpile. More deadly: Today’s nuclear weapons can be far more devastating than the horror ...