On August 6th, 1945, the first atomic bomb was dropped on Hiroshima, Japan.
The detonation was the equivalent of 16 kilotons of TNT, creating a one-mile radius of destruction, with fires spreading across 4.4 square miles. It was considered very inefficient, with only 1.7 percent of the material actually undergoing nuclear fission. The Enola Gay spent two minutes over the target area, but was 10 miles away when the bomb detonated. The crew was 11.5 miles away when they felt the shockwave. Only three onboard the Enola Gay knew what they were carrying. The other men were told only to expect a blinding flash and given safety goggles.
Learn the history of the atomic bomb at Ammo.com.