Hiroshima after the atom bomb explosion. (Photo by Three Lions/Getty Images)
Hiroshima Bombings: Aug. 6, 1945
The aftermath of the atom bomb dropped on Hiroshima, Japan, by the Americans at the end of World War II. The occupants of the burned-out bus were all killed. (Photo by Keystone/Getty Images)
Hiroshima Bombings: Aug. 6, 1945
A building stands in ruins after the atomic bomb blast at Hiroshima. (Photo by Keystone/Getty Images)
Hiroshima Bombings: Aug. 6, 1945
The twisted wreckage of a theatre, located 800 metres from the epicentre of the atomic explosion at Hiroshima. (Photo by Keystone/Getty Images)
Hiroshima Bombings: Aug. 6, 1945
An aerial view of the atomic bomb damage at Hiroshima. (Photo by Keystone/Getty Images)
Hiroshima Bombings: Aug. 6, 1945
A file photo dated September 1945 of the remains of the Prefectural Industry Promotion Building after the bombing of Hiroshima, which was later preserved as the Hiroshima Peace Memorial, Atomic Bomb Dome or Genbaku Dome. (Photo credit should read AFP/Getty Images)
Hiroshima Bombings: Aug. 6, 1945
American bomber pilot Paul W. Tibbets Jr. (center) stands with the ground crew of the bomber 'Enola Gay' which Tibbets flew in the atomic bombing of Hiroshima, Tinian Island, Northern Marianas, August 1945. Ground crew includes (left to right) engine mechanic Private Harold Olsen, Corporal John Jackson, crew chief Staff Sergeant Walter McCaleb, Tibbets, engine mechanic Sergeant Leonard Markley, engine mechanic Sergeant Jean Cooper, engine mechanic Private John Lesnieski. About 120,000 people were killed outright by just one atomic bomb (called 'Little Man') and nearly a quarter million over time from injuries and radiation effects. (Photo by AFP/Getty Images)
Hiroshima Bombings: Aug. 6, 1945
This file photo dated 1945 shows the devastated city of Hiroshima in days after the first atomic bomb was dropped by a US Air Force B-29, 06 August 1945. (AFP/AFP/Getty Images)
Hiroshima Bombings: Aug. 6, 1945
This photo dated August 1945 shows a man whose back has been totally burnt during the atomic bomb dropped by the US on Hiroshima. (AFP/AFP/Getty Images)
Hiroshima Bombings: Aug. 6, 1945
(FILES) This file picture dated 1945 shows the devastated city of Hiroshima after the first atomic bomb was dropped by a US Air Force B-29 on August 6, 1945. United Nations chief Ban Ki-moon on August 6, 2010 will become the first UN chief to attend the anniversary ceremony commemorating the August 6, 1945 atom bomb attack on Hiroshima, which was followed three days later by the Nagasaki bombing. The US atomic attacks killed 140,000 people in Hiroshima and more than 70,000 in Nagasaki, either instantly or later through the horrific effects of burns from the white-hot nuclear blast and radiation sickness. AFP PHOTO / FILES (Photo credit should read STR/AFP/Getty Images)
