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.

For this lesson, students examine the impact of weapons of mass destruction, e.g., the atomic bombs dropped on Japan in World War II. They look at nuclear proliferation and treaties, and debate the pros and cons of nuclear weapons.

In-depth analysis of the decision to create and drop the atomic bomb on Japan during World War II. Includes details on the Interim Committee.

Statement made on August 6, 1945, by the former Secretary of War, Stimson. Discusses the details of the production of the atomic bombs used to end World War II. Introduces the members of the Interim Committee as well. Site by Ibiblio.org.

Pictorial essay showcases the story of the atomic bombing and recovery of Hiroshima during World War II.

Read about Harry Truman and his decision to drop atomic bombs on Japan which ultimately ended World War II.

[Free Registration/Login Required] Documents by Manhattan Project scientists expressing their concern about nuclear weapons after the bombings in Japan.

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...

Credited with the creation of the atomic bomb, Robert Oppenheimer opposed the development of the hydrogen bomb. Read about Oppenheimer's education and involvement in the atomic explosions, which "changed the world forever."

These scripts (the first of two drafts) describe the events in World War II in the Pacific Theater.

This article has information about the bombings of Hiroshima and Nagasaki. Additional information about the measures that have been taken about atomic warfare and testing since the bombings included.

This detailed chronology of the events and communication of 1945-1946 shows Truman's role in the process of the decision to drop the world's first atomic bomb used in warfare upon Hiroshima and then the second upon Nagasaki. Also...

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,...

Discusses the Manhattan Project of the United States which worked on developing nuclear weapons during World War II. It led to the two atomic bombs that were dropped on Japan in August 1945, ending the war with Japan.

Comprehensive teaching unit on tensions of the Cold War era: conflicts between domestic prosperity and unfulfilled expectations, ideals of conformity and individualism. Contains video and text materials, web interactives, student...

This site from PBS provides biographical information about J. Robert Oppenheimer, and his involvement with the atomic bomb.

Outlines the devastation the atomic bomb had on Hiroshima and Nagasaki, Japan.

Find out about the Intercontinental Ballistic Missile program, a post-World War II, U.S. military defense system.

This site has information about the bombings of Nagasaki and Hiroshima. The information is detailed and in depth. Contains many links to related sites.

Read this detailed account of the decision and action to drop two atomic bombs on Japan after the attacks on Pearl Harbor.

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...

This site from Nuclearfiles.org allows you to read about Robert J. Oppenheimer's role in the Manhattan Project, as head of the Atomic Energy Commission and then his dismissal as a "security threat" to the U.S. government during the era...