The Manhattan Project was started by President Roosevelt in 1942 to ensure that the U.S. beat the Germans in developing a nuclear bomb. Whom did Roosevelt appoint as scientific head the Manhattan Project?

President Roosevelt appointed J. Robert Oppenheimer as the scientific director of the Manhattan Project in 1942. Oppenheimer led the research team at Los Alamos Laboratory that developed the first atomic bombs. Leslie Groves was the military head, while Vannevar Bush and James Conant were administrative leaders. Oppenheimer's scientific leadership was crucial to the project's success.