A view of the atomic bomb, codenamed “Little Boy,” as it is hoisted into the bay of the Enola Gay on the North Field of Tinian airbase, North Marianas Islands. The bomb was dropped over Hiroshima, Japan on August 6, 1945.

A group of men preparing ‘Little Boy,’ code name for the atomic bomb that was dropped on Hiroshima in 1945

The crew of the Enola Gay. Left to right kneeling; Staff Sergeant George R. Caron; Sergeant Joe Stiborik; Staff Sergeant Wyatt E. Duzenbury; Private first class Richard H. Nelson; Sergeant Robert H. Shurard. Left to right standing; Major Thomas W. Ferebee, Group Bombardier; Major Theodore Van Kirk, Navigator; Colonel Paul W. Tibbetts, 509th Group Commander and Pilot; Captain Robert A. Lewis, Airplane Commander.

An aerial view from a U.S. Air Force bomber of smoke rising from Hiroshima, shortly after 8:15 am. on August 6, 1945, after the atomic explosion.

Hiroshima in ruins after the dropping of the atomic bomb on August 6, 1945. The circle indicates the target of the bomb. The bomb directly killed an estimated 80,000 people. By the end of the year, injury and radiation brought the total number of deaths to between 90,000 and 166,000.

The plutonium bomb shown in transport, nicknamed “Fat Man,” became the second nuclear bomb dropped by U.S. forces in World War II.

The second nuclear bomb was dropped on the city on August 9, 1945, in the last days of WWII shortly before the surrender of Japan. The attack destroyed about 30 percent of the city.

Only the reinforced concrete buildings of the Nagasaki Medical College hospital remained standing after the August 9, 1945 bombing of the city. The hospital was located 800 meters from ground zero of the explosion.

This area in the Nagasaki suburbs, four miles away from the city proper, was almost as badly damaged as the areas in the center of the city. Wreckage is piled high on either side of the roadway.

A water soaked photo album, shards of pottery and a pair of scissors amid the devastation after the bombing on Nagasaki.

7th September 1945: View of one of the only structures left standing, one day after the U.S. dropped an atomic bomb on Hiroshima, Japan. The building, also known as the Genbaku Dome, is now the centerpiece of the Hiroshima Peace Memorial Park.

A homeless group of mostly children warm their hands over a fire on the outskirts of Hiroshima after the end of WWII.

A victim of the atomic bomb blast over Hiroshima, in a makeshift hospital in a bank building, September 1945.

Children in Hiroshima, Japan are shown wearing masks to combat the odor of death after the city was destroyed, pictured October 1945.

Hiroshima pictured eight months after the atomic bomb was dropped, still standing in ruins.

Survivors hospitalized in Hiroshima show their bodies covered with keloids caused by the atomic bomb, circa 1947.