This section provides an overview of the history of the Manhattan Project, the key organizations involved, the science behind the bomb, and more.
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.
A ruined synagogue in Eisenach after Kristallnacht in 1938

Scientific Exodus

A startling proportion of the most famous names on the Manhattan Project belonged to scientists who came to England or America to flee from the Axis.
Smyth Report

Secrecy Unveiled - 1945

Henry DeWolf Smyth prepared the official U.S. government history about the development of the atomic bombs.
The Los Alamos main gate

Security and Secrecy

A key component of keeping the Manhattan Project secret was making sure Project sites were secret and secure.
South African nuclear bomb casings, courtesy of Mungo Poore

South African Nuclear Program

South Africa is the first and only country to have successfully developed and then dismantled nuclear weapons.
Joe-1 (replica)

Soviet Atomic Program - 1946

Soviet physicists paid close attention to the news of the discovery of fission in Germany in 1938, and began research shortly thereafter.