A timeline with primary source documents and photos of the invention and use of the atomic bomb during World War II. Links to additional information and videos are also provided.

A comprehensive overview of the Manhattan Project, a research and development project initiated by President Roosevelt to produce nuclear weapons in World War II.

J. Robert Oppenheimer is credited with the creation of the atomic bomb. But, "The country asked him to do something and he did it brilliantly, and they repaid him for the tremendous job he did by breaking him." This documentary traces...

This resource describes the world's first nuclear reactor and the role which it played in the Manhattan Project. Also discussed are topics such as the goal of plutonium development for nuclear weapons, the goals of the top-secret,...

This resource provides data about the physical destruction of Nagasaki, the medical aspect, and survivor stories.

An indexing page which links to several pages of letters, diary excerpts, public reports, and personal correspondence relating to the use of the first atomic bomb. Includes letters and petitions drafted by scientists involved with the...