This day in 1945

From here: Washington, Aug. 6 -- The White House and War Department announced today that an atomic bomb, possessing more power than 20,000 tons of TNT, a destructive force equal to the load of 2,000 B-29's and more than 2,000 times the blast power of what previously was the world's most devastating bomb, had been dropped on Japan.

The announcement, first given to the world in utmost solemnity by President Truman, made it plain that one of the scientific landmarks of the century had been passed, and that the "age of atomic energy," which can be a tremendous force for the advancement of civilization as well as for destruction, was at hand.

At 10:45 o'clock this morning, a statement by the President was issued at the White House that sixteen hours earlier- about the time that citizens on the Eastern seaboard were sitting down to their Sunday suppers- an American plane had dropped the single atomic bomb on the Japanese city of Hiroshima, an important army center.