This section provides an overview of the history of the Manhattan Project, the key organizations involved, the science behind the bomb, and more.
Technical description, photographs, and video of atomic bombs Little Boy and Fat Man dropped on Hiroshima and Nagasaki in August 1945.
The summer of 1942 proved to be troublesome for the fledgling bomb project.
With the US now at war, a sense of great urgency permeated the government's scientific enterprise.
During the early part of the twentieth century, physicists and chemists toyed with the idea of obtaining energy from atoms.
Many of the communities established during the Manhattan Project relied on Native American cooperation.
In the 1930s, scientists observed and explained nuclear fission--splitting an atom--for the first time.
The Nuclear Non-Proliferation Treaty (NPT) is a comprehensive international arms control agreement addressing both horizontal and vertical nuclear proliferation.
One of the Manhattan Project’s many legacies is the development of peaceful nuclear reactors.
The unprecedented use of nuclear weapons in World War II served as the starting point for an ongoing era of nuclear proliferation.