USA HISTORY

Detailed explanation-1: -The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada.

Detailed explanation-2: -The Manhattan Project was the code name for the American-led effort to develop a functional atomic weapon during World War II.

Detailed explanation-3: -Manhattan Project, U.S. government research project (1942–45) that produced the first atomic bombs. American scientists, many of them refugees from fascist regimes in Europe, took steps in 1939 to organize a project to exploit the newly recognized fission process for military purposes.

Detailed explanation-4: -Secret work. During World War II, about 130, 000 people were involved in the Manhattan Project, a highly classified collective effort that produced the first nuclear weapons and changed science, and war, forever.

Detailed explanation-5: -Security was a way of life for the Manhattan Project. The goal was to keep the entire atomic bomb program secret from Germany and Japan. In this, Manhattan Project security officials succeeded. They also sought, however, to keep word of the atomic bomb from reaching the Soviet Union.