Led the team that achieved the first controlled, self-sustaining nuclear chain reaction at the University of Chicago in 1942.
The "hard-driving" director of the project from the U.S. Army Corps of Engineers who oversaw all construction and security. The Manhattan Project: Making the Atomic Bomb
While not a project member, his 1939 letter to President Roosevelt warning of German nuclear potential served as the project’s initial catalyst. 2. Major Research and Production Sites Led the team that achieved the first controlled,
The project was spread across clandestine "secret cities" in the United States. The Manhattan Project - Department of Energy The Manhattan Project: Making the Atomic Bomb