This section provides an overview of the history of the Manhattan Project, the key organizations involved, the science behind the bomb, and more.
President George H. W. Bush and President Mikhail Gorbachev sign United States/Soviet Union agreements to end chemical weapon production and begin destroying their respective stocks, 1990. Photo courtesy of the George Bush Presidential Library.

Post-Cold War World

The collapse of the Soviet Union in 1989 created a number of problems for the international community with regards to nuclear weapons.
Winston Churchill, Harry Truman, and Joseph Stalin

Potsdam: The Crossroads of Atomic Science and International Diplomacy

The Potsdam Conference was attended by representatives of the United States, the United Kingdom, and the Soviet Union in July 1945.
Project Alberta team members on Tinian

Project Alberta

Project Alberta, also known as Project A, was a division of the Manhattan Project created to plan and carry out all the necessary steps for making the atomic bombs operational.
B29 Superfortess.

Project Silverplate

Project "Silverplate" was the code name for the program to produce a special version of the B-29 capable of delivering the atomic bomb.
Karl Karpinski, Sgt Daniel Yearout, Michael Morgan, and Sgt John Crimmons at a Cabin near Guaje Canyoun

Provisional Engineer Detachment

Members of the Provisional Engineer Detachment (PED) played an integral part in the construction, operation, and maintenance of the “Secret City” of Los Alamos, New Mexico.
J. Robert Oppenheimer hosting a party at his home in Los Alamos

Recreation and Leisure at Los Alamos

Los Alamos’s residents organized many different means of recreation and leisure.
Flag at Trinity Site at half-staff in remembrance of Roosevelt

Remembering Franklin Delano Roosevelt

Manhattan Project veterans remember the death of President Franklin Delano Roosevelt.
World War II poster


Protecting workers was an important priority for Manhattan Project officials.
The science behind the bomb

Science Behind the Atom Bomb

The U.S. developed two types of atomic bombs during the Second World War.