Roosevelt placed the responsibility of building the bomb with the U.S. Army Corps of Engineers. The Corps of Engineers supervises the army’s engineering projects. A separate district manages each project. Colonel J.C. Marshall was ordered to set up a new and extremely secret district to develop the atomic bomb. Because Marshall’s office was in New York City, this new district was called the Manhattan Engineer District, and his top-secret mission was code-named the Manhattan Project. At first, the Manhattan Project was beset with organizational problems. Many scientists did not want to work directly for the military. More tensions surfaced when Colonel Marshall selected Stone & Webster, a Boston engineering firm, to supervise the construction of uranium production plants. Many scientists objected to this arrangement. As Glen Seaborg, co discoverer of plutonium, wrote: "A number of the...