Almost 1,800 men were assembled n late 1944 to join the top - secret unit called the 509th Composite Group. Col. Paul Tibbets, the pilot who would drop the world's first atomic bomb over Hiroshima, Japan, was commander of the unit and chose the men.
Almost 1,800 men were assembled in late 1944 to join the top secret unit called the 509th Composite Group.  The pilot, Paul Tibbets, would drop the first atomic bom over Hiroshima, Japan.