This online book provides a detailed account of the U.S. creation of the atomic bomb, the attack on Hiroshima and Nagasaki, and the aftermath. Written by The Manhattan Engineer District, a military committee, in 1946.

History, archival film footage, photographs, pictures, maps, and biographies of people connected to the bombings, and related documents and resources.

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.

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...

World War II ends with the legacy of its final moment: the atomic bomb. After reading comprehensive background material, interactive feature lets you decide if President Truman was correct in his decision to drop atomic bombs on...

A touching and horrifying description of the devastation caused by the dropping of atomic bombs on Hiroshima and Nagasaki, which brought about the surrender of Japan in World War II. Suggested student exercises accompany the information....

In the final days of World War II, the US dropped atomic bombs on Hiroshima and Nagasaki. Was President Truman correct in his decision? Compare your response to others.

Comprehensive discussion of V-J Day or the day victory was declared in Japan. Includes details and facts about World War II and the war in the Pacific, the surrender, related photos and speeches, battle maps, and more.

Innovations in transportation, communication, and weapons transformed the world in the 20th century. The modern era is the most complex yet, and the most fragile. This photo gallery highlights some of these innovations.

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...

Students will discuss the role of technology of the atomic bomb and explore the destruction of Nagasaki and Hiroshima during WWII. Students will then outline some of the social and political changes that resulted from the Manhattan Project.

This site explores the Cold War race to develop the hydrogen bomb, a weapon that would change the world. Content details all the people who were involved in the race for the H-Bomb, as well as notable events during this time period....

Everything you wanted to know and more about Harry S. Truman, from biographical information to love letters.

Was it necessary to drop the atomic bomb on Japan in order to save lives? Were the consequences worse than the waiting for a surrender of Japan? Read this discussion of the decision to drop the bomb, find out about the possible motives...

Published on 8/04/05, the BBC interviewed three of the men involved in the mission to drop the atomic bomb on the city of Hiroshima. We get their viewpoints and an understanding of what their duties were on that day.