the Radiation Laboratory into two sections, one for incoming radar signals, and one for outgoing radar signals. Bacher was appointed to handle the incoming signals section. Here he gained valuable experience in administration, coordinating not just the efforts of his scientists, but also those of General Electric and RCA. He later recalled: Manhattan Project In 1942, Bacher and Rabi, the Radiation Laboratory's assistant director, were approached by Oppenheimer to join the Manhattan Project at its new laboratory in Los Alamos, New Mexico. They convinced Oppenheimer that the plan for a military laboratory would not work, since a scientific effort would need to be a civilian affair. The plan was modified, and the new laboratory would be a civilian one, run by the University of California under contract from the War Department. Bacher felt that this was his first contribution to the success of the project. He met with Oppenheimer at Los Alamos in April 1943, but was not convinced that he was needed. Oppenheimer wrote to him that: Bacher then accepted the job at Los Alamos, moving there in May 1943 with his family to become the head of the Experimental Physics Division (P Division). His wife Jean Dow Bacher was also hired to work as a human computer in the Theoretical Division (T Division). For his seven group leaders he had John H. Williams, Robert R. Wilson, John H. Manley, Darol K. Froman, Emilio G. Segrè, Bruno B. Rossi and Donald W. Kerst. Bacher worked closely with Oppenheimer, and the two men discussed the project's progress on a daily basis. In July 1944, Oppenheimer reorganized the laboratory to focus on the problem of building an implosion-type nuclear weapon, which was necessary because the gun-type design would not work with plutonium. P Division was broken up, and Bacher became the head of the G (for Gadget) Division. This much larger division contained eleven groups headed by leaders who included William Higinbotham, Seth Neddermeyer, Edwin McMillan, Luis Alvarez and Otto Frisch. While George Kistiakowsky's Explosives Division (X Division) developed the explosive lenses, G Division designed the rest of the weapon. There were numerous difficulties to overcome, not the least of which was devising a means of detonating the lenses with the required speed. Robert F. Christy's solid core design was chosen as the most likely design to succeed. To coordinate the efforts of the laboratory, Oppenheimer created the "Cowpuncher Committee", so-called