The atomic bomb was dropped in August the United States dropped atomic bombs on the Japanese cities of Hiroshima and Nagasaki. The two bombings, which killed at least people, remain the only use of nuclear weapons for warfare in history.
Date: October 1961 Location: Detonated over Mityushikha Bay on Novaya Zemlya island in the Novaya Zemlya Archipelago Blast Yield: 50 megatons The resulting mushroom cloud was nearly 40 miles high and 25 miles wide.
Operation Castle - Romeo Event The Romeo Event was part of Operation Castle. Romeo was detonated from a barge near Bikini atoll on March Photo courtesy of National Nuclear Security Administration / Nevada Site Office