After the first atomic bomb explosion (seen here from 10,000 yards away, in a time series from .006 seconds to .081 seconds after detonation), Oppenheimer recalled, "a few people laughed ...

Photo: Atomic bomb test explosion in Alamagordo ... The German government took little notice of the finding at first. But others felt the implications were immediately clear.

On July 16, 1945, the US conducted the world's first test of a nuclear weapon. Less than a month later, two bombs were dropped on the Japanese cities of Hiroshima and Nagasaki, bringing about the ...

HIROSHIMA--Teruko Yahata was eight when she saw a blueish-white light envelop the sky over her home city of Hiroshima one summer morning, moments before the first atomic bomb explosion knocked her ...