After graduate work in theoretical physics he was recruited to the Manhattan Project where he directed the new research of the first nuclear weapon. On July 16, 1945 the first test bomb was detonated.

1956 test of a nuclear cannon with a 8 inch wide projectile capable of traveling 11 miles with the force of the Hiroshima atomic bomb ... A brief treatment of nuclear weapons follows. ...

Nuclear Weapon News and Background page 1 ... Fallout was discovered 200 miles from the test site where "Trinity," the first nuclear bomb, was detonated in New Mexico in July 1945. ...

The first nuclear devices invented and deployed were powered by nuclear fission. Fission is the process of splitting the nucleus of an atom into two smaller fragments.

Although the data given below is based on the US made Gadget/Fat Man, it also applies to a large extent to the first Soviet atomic bomb, ... Instead newly invented exploding wire detonators were used. ...

VIsit the First Nuclear Reactor; See Where Atomic Bomb Fuel Was Made ... The world's first full-scale nuclear reactor. ... The calutron, invented by Lawrence O. Berkley, was based on the mass-spectrometer, ...

Iran's Nuclear Bomb: Acquiesce or Attack? - The Huffington Post ... Beneath the surface optimism, however, a deeper unease has emerged repeatedly about Iran--and specifically about Iran's nuclear bomb.

Israeli scientist: The September raid on Syria hit a nuclear bomb factory ... Not a nuclear reactor. A nuclear bomb factory, with North Korea providing the plutonium.

Albert Einstein and other scientists told Roosevelt of Nazi Germany efforts to build an atomic bomb - the United States Government began the Manhattan Project that produced the first atomic bomb.