USA HISTORY

Detailed explanation-1: -The first atomic bomb was built in Los Alamos, New Mexico, during World War II under a top secret U.S. government program called the Manhattan Project. Los Alamos was approved as the site for the main atomic-bomb scientific laboratory on November 25, 1942, by Brigadier General Leslie R. Groves and physicist J.

Detailed explanation-2: -J. Robert Oppenheimer (1904-1967) was an American theoretical physicist. During the Manhattan Project, Oppenheimer was director of the Los Alamos Laboratory and responsible for the research and design of an atomic bomb. He is often known as the “father of the atomic bomb.”

Detailed explanation-3: -In August 1945, the atomic bombings of Hiroshima and Nagasaki were conducted by the United States against Japan at the close of that war, standing to date as the only use of nuclear weapons in hostilities.

Detailed explanation-4: -The Manhattan Project was the US government program during World War II that developed and built these first atomic bombs. Detonation of these first nuclear bombs signaled arrival of a frightening new Atomic Age.