On August 6, 1945, the world was electrified by the news that an American bomber had dropped an atomic bomb, with an explosive power equivalent to 20,000 tons of TNT, on the important Japanise military center of Hiroshima. Three days later, another bomb, of improved design and even greater power, was dropped on Nagasaki. The following day, August 10, the Japanese sued for peace

This book chronicles the history of the atomic bomb leading up to the initial use in the war against Japan.