As World War II broke out around the globe in the early 1940s, the US government created the Manhattan Project, a team of mathematicians, scientists, and engineers to create the world’s first atomic weapon.
75 years ago, on July 16, 1945, the group tested its first nuclear bomb at a U.S. Air Force base in New Mexico.
Physicist Norris Bradbury sits next to The Gadget, the nuclear device built to test the world's first atomic bomb, at the top of the test tower at the Trinity Site in New Mexico, 1945.
View of the ground zero approximately two months after the detonation of the first nuclear weapons test, coded named Trinity. In the center are the stumps of the steel tower from which the bomb was suspended during the detonation.