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Atomic Bomb
President Roosevelt approves production of the atomic bomb -
Groves' Bomb Testing
Brigadier General Leslie R. Groves selects Los Alamos, New Mexico, as site for separate scientific laboratory to design an atomic bomb. -
Harry S. Truman becomes President.
President Roosevelt dies, in turn Truman takes over the presidency. -
Germany surrenders.
Germany surrenders from the war on this day. -
Hiroshima
The uranium bomb, called Little Boy, is dropped on Hiroshima, Japan on this day. -
Nagasaki
Nagasaki was bombed three days later resulting in a surrendering Japan within the following five days. -
Soviet's first atomic weapon.
The Soviet Union detonates its first atomic device on this day. -
President Eisenhower
Eisenhower is inaugurated on this day.