This section provides an overview of the history of the Manhattan Project, the key organizations involved, the science behind the bomb, and more.
The Bulletin of the Atomic Scientists is a journal founded in 1945 that analyzes nuclear policy challenges.
On March 1, 1954, the United States carried out its largest nuclear detonation, “Castle Bravo,” at Bikini Atoll in the Marshall Islands. The Bravo explosion was more than two and a half times greater than expected and caused far higher levels of fallout and damage than scientists had predicted.
On December 2, 1942, Chicago Pile-1 went critical, creating the world’s first controlled, self-sustaining nuclear chain reaction.
Before the Manhattan Project, about two thousand people lived in White Bluffs, Hanford, and Richland, WA or nearby. For centuries, four different Native American tribes enjoyed the land along Columbia River.
To build the Los Alamos Laboratory, the Army took over the land of two dozen homesteaders, the Los Alamos Ranch School, and the Anchor Ranch.
During the Manhattan Project, about 3,000 families and farmers from rural, Eastern Tennessee were displaced for new research and development sites.
The Cold War began shortly after WWII and plunged the world into a series of conflicts that would last more than forty years.
The Combined Development Trust (CDT) was an effort spearheaded by General Leslie Groves to control the world market of uranium ore.
The development of early computing benefited enormously from the Manhattan Project’s innovation.