24 hours after Hiroshima Experience is the second-by-second events just moments before an atomic bomb is used on people for the first time in human history.The use of atomic weapons brought a quick end to World War II, but at an incredible human cost. Hiroshima was the first time atomic weapons had been used in combat, and they have only ever been used on one other occassion, in the subsequent bombing of Nagasaki.24 hours after Hiroshima Experience is the second-by-second events just moments before an atomic bomb is used on people for the first time in human history.The use of atomic weapons brought a quick end to World War II, but at an incredible human cost. Hiroshima was the first time atomic weapons had been used in combat, and they have only ever been used on one other occassion, in the subsequent bombing of Nagasaki.