Nuclear explosion debris. The first man made nuclear explosion occurred on July 16, 1945 at 5:50 am on the Trinity Test Site near Alamogordo, New Mexico in the United States, an area now known as the White Sands Missile Range. The event involved the full-scale testing of an implosion-type fission atomic bomb. In a memorandum to the U.S. Secretary of War, General Leslie Groves describes the yield as equivalent to 15,000 to 20,000 tons of TNT. Following this test, a uranium-gun type nuclear bomb (Little Boy) was dropped on the Japanese city of Hiroshima on August 6, 1945, with a blast yield
Atomic Bomb Casualty Commission 1975. The Atomic Bomb Casualty Commission (ABCC) was formed after the United States attack on Hiroshima and Nagasaki on August 6 and August 9, 1945. The ABCC originally began as the Joint Commission The ABCC set out to obtain first-hand technical information and make a report to let people know the opportunities for a long-term study of atomic bomb casualties. In 1946, Lewis Weed, head of the National Research Council, called together a group of scientists who agreed that a "detailed and long-range study of the biological and medical effects upon the human being" was "of the utmost importance to