Jumbo was designed by Los Alamos lab to act as a failsafe device for the Trinity test explosion.

Hungarian-American physicist Leo Szilard's petition sought to avert use of the atomic bombs against Japan.

The Limited Test Ban Treaty (LTBT), also known as the Partial Test Ban Treaty (PTBT), is an arms control agreement intended to restrict the testing of nuclear weapons and limit nuclear proliferation.

Technical description, photographs, and video of atomic bombs Little Boy and Fat Man dropped on Hiroshima and Nagasaki in August 1945.

The Pajarito Plateau has been home to a number of inhabitants who have each uniquely shaped the landscape and history of the area.

Mail censorship was a crucial aspect of the secrecy of the Manhattan Project. Individuals at Los Alamos remember situations where mail censorship disrupted their lives.

The summer of 1942 proved to be troublesome for the fledgling bomb project.

During World War II, partly thanks to media censorship, the United States government kept the best-held secret: the building of the atomic bomb.

With the US now at war, a sense of great urgency permeated the government's scientific enterprise.