On August 6, 1945, aboard the Enola Gay B-29 Superfortress, the United States of America deployed a uranium gun-type fission bomb known as Little Boy on the Japanese city of Hiroshima. The weapon detonated with an explosive yield equivalent to 15 kilotons of TNT. At least 66,000 people were killed as a direct result of the blast, according to figures published in 1945. Three days later, on August 9, 1945, the city of Nagasaki was bombed.
