
Trinity Test base camp: This is a historical photo of Trinity Test base camp, which housed soldiers and scientists working on the project.

Oppenheimer: Under the guidance of J. Robert Oppenheimer, the laboratories at Los Alamos, New Mexico, were constructed. He oversaw some of the top experts in physics to work on creating an atomic bomb. Their research resulted in the world's first nuclear explosion on July 16, 1945.

Gadget: Sgt. Herbert Lehr is shown delivering a portion of the plutonium core for the bomb -- nicknamed the Gadget -- in its shock-mounted carrying case to the assembly room in the McDonald Ranch house.

Preparation: The world's first atomic device is shown being readied at the base of the tower at Trinity Site in 1945.

Bradbury: Norris Bradbury, head of bomb design at Los Alamos, stands next to the Gadget in 1945.

Jumbo: A photo of "Jumbo," the 216-ton steel cylinder scientists contemplated detonating the bomb within to contain its plutonium core if the full detonation failed.

Assembly: Oppenheimer, second from left, oversees final assembly of the Gadget.

Explosion: One of humanity's most memorable moments captured in black and white -- the explosion from the Trinity test.

Mushroom cloud: A color photograph of the Trinity mushroom cloud.

The crater: This an aerial view of Trinity nuclear test crater, which is now filled in.

Manhattan Project: J. Robert Oppenheimer (third from left) and Gen. Leslie Groves, director of the top secret Manhattan Project, were among the people to visit the Trinity detonation site on September 11, 1945. Groves personally selected Oppenheimer as leader of the Los Alamos laboratory.



