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, self-sustaining nuclear chain reaction at the University of Chicago in 1942. The Manhattan Project: Making the Atomic Bomb

The brilliant theoretical physicist who served as the scientific director of the Los Alamos Laboratory, where the bombs were actually designed. While not a project member, his 1939 letter

The project was a monumental collaboration between military organization and scientific research. While not a project member