This section provides an overview of the history of the Manhattan Project, the key organizations involved, the science behind the bomb, and more.
In 1914, novelist H. G. Wells envisioned an atomic bomb that would produce a continual radioactive explosion in his book "The World Set Free."
By late 1939, there was still a lack of an overall "sense of urgency" among other government officials on atomic research.
The first concerted effort to understand and study the effects of radiation on humans began in Chicago in 1942.
Both the Oak Ridge and Hanford sites were chosen for their isolation and access to hydropower from surrounding river systems.
Espionage was one of General Groves' main concerns during the Manhattan Project.
“I don't believe a word of the whole thing,” declared Werner Heisenberg, the scientific head of the German nuclear program, after hearing the news that the United States had dropped an atomic bomb on Hiroshima.
A detailed timeline of the bombings of Hiroshima and Nagasaki.
A list of the planes and the crews that flew on the Hiroshima and Nagasaki bombing missions.
Many scientists associated with the Manhattan Project were eventually investigated by the House Un-American Activities Committee.