Even those in the group only knew as much as they needed to know in order to perform their duties. The group was segregated from the rest of the military and trained in secret. Army Air Force to deliver and deploy the first atomic bombs during World War II. The 509th Composite Group was formed by the U.S. Almost all had something to say after the war. Some chose to keep a low profile and others spoke out about their place in history. On August 6, 1945, the B-29 bomber Enola Gay dropped an atomic bomb on the city of Hiroshima.
