On July 16, 1945, at exactly 5:29:45 a.m., the world entered the atomic age ... ending World War II. At the time, Oppenheimer celebrated and even said he wished the bomb had been made earlier ...

But how close did Hitler get in building an atomic bomb, and what would the likely scenario be had he done so? Click through for a brief history of how the Nazis tried to develop the ultimate weapon.

What happened on 6 August 1945? In the small hours of a warm summer day, the B-29 Superfortress Enola Gay flew from a US base on Tinian over the Japanese mainland. In the hold was an experimental ...

The museum, one of the Smithsonian Institution facilities, will exhibit photos of both cities after the atomic bombs were dropped in World War II although ... of the atomic bomb dropped over ...

Photos were shot by 27 people and one Japanese organization between Aug. 6, 1945, when the first atomic bomb was dropped on Hiroshima, killing around 140,000 people, and December of the same year.