ACDS
The Manhattan Project was the secret project to design and build the world's first atomic bomb.
The nuclear was a secret before the bombs hit the targets.
America's Secret Establishment was created in 1986.
America's Secret War was created in 2004.
The development of the atomic bomb was not only the most ambitious scientific enterprie in history, it was also the best-kept secret of the war.
The secret code name for the U.S. project established in 1942 to develop atomic bombs during World War II was the Manhattan Project. This top-secret initiative brought together some of the greatest scientific minds of the time and aimed to harness nuclear fission for military use. The project's success culminated in the development and deployment of atomic bombs in 1945.
Secret codes were developed for technologies like the atomic bomb to protect sensitive information from espionage and prevent adversaries from gaining access to critical military advancements. The successful development and use of the atomic bomb marked a significant shift in global power dynamics, as it introduced the concept of nuclear deterrence, fundamentally changing international relations and military strategy. Additionally, the secrecy surrounding such technologies fostered a culture of mistrust and competition during the Cold War, leading to an arms race and heightened tensions between superpowers.
The secret project to design an atomic bomb during World War II was called the Manhattan Project. It was led by the United States with the goal of developing the first atomic weapons.
President Franklin D. Roosevelt authorized the development of the atomic bomb, but Harry Truman was President at the time of the bomb's first successful test, and he is the one who authorized its use in populated areas. The Manhattan Project, the development of the atomic bomb, was such a secret that even Vice President Truman didn't know about it until after he became President. (I don't know whether or not Vice President Wallace knew about the project.)
It's a secret!
Actually there is no secret to the atomic bomb. However Klaus Fuchs & Ted Hall provided the plans of Fat Man. This saved them considerable engineering effort.