This section provides an overview of the history of the Manhattan Project, the key organizations involved, the science behind the bomb, and more.
The Japanese attack on Pearl Harbor brought the US into World War II.
On April 9, 1942, the American troops on the Bataan Peninsula of the Philippines surrendered to the Japanese. The captured men were then subjected to the Bataan Death March, a tortuous 75-mile march, in which nearly half the troops died.
President Franklin D. Roosevelt authorized the research, development, and production of an atomic bomb despite great uncertainties.
The first atomic bomb, Little Boy, was dropped on Japan on August 6, 1945.
During the first half of 1942, several routes to a bomb were explored.
The Frisch-Peierls Memorandum was an important assessment confirming the feasibility of an atomic bomb.
The U.S. military uses the term “Broken Arrow” to refer to an accident that involves nuclear weapons or nuclear weapons components.
The most difficult part of the Manhattan Project was not the scientific theory of the bomb but the engineering.
On December 2, 1942, Chicago Pile-1 went critical, creating the world’s first controlled, self-sustaining nuclear chain reaction.