Paul Tibbets the pilot of the Enola Gay who drop the bomb, considered in the USA an hero at the time, never expressed during his long life much regret on the death of thousands of innocent victims. The uranium bomb was dropped on Hiroshima on the 6th August 1945. This enabled him to tell Stalin that the United States had a new and terrifying weapon against Japan. President Truman received the news at the Potsdam Conference, which was being held at the same time. It was estimated that the energy of the explosion was divided as follows: 35% as heat, 50% for the blast and 15% in the form of radioactive energy. The strong expansion of the air around the epicenter generated a blast. A huge fireball was created immediately after the explosion accompanied by a wave of heat and extremely high radioactivity. The energy of the plutonium bomb dropped on Nagasaki, nicknamed FAT Man, was estimated at 21 kilotons of TNT.
