Manhattan Project

Manhattan Project was the code name given to the US project to develop an atomic bomb – an explosive device based on the phenomenon of nuclear fission – during World War II. The Manhattan Project was established at Chicago, California, and Columbia universities, as well as at Los Alamos, New Mexico, and other centers under the directorship of J. Robert Oppenheimer. By December 1942, a team led by Enrico Fermi, which included, among others, Edward Teller, initiated the first self-sustaining nuclear chain reaction. On July 16, 1945, the first atomic bomb was detonated near Alamogordo, New Mexico, and similar bombs the next month were dropped on the Japanese cities of Hiroshima (August 6) and Nagasaki (August 9).