Manhattan Engineer District

Alfred Nier: By the summer of 1943, the question came up, what I should do next? And I had a chance to – [J. Robert] Oppenheimer had gotten a hold of me and suggested I might come out to Los Alamos. Stephane Groueff: And you knew him? Nier: I knew him, yes. I had met […]

Stephane Groueff: General James Marshall, New York, November 4, 1965. Groueff: When and how and where did you first learn about the project and who assigned you and where and when? All the details of your assignment. James Marshall: My journal, kept for many years, shows that on June 17, 1942 – which was a […]

[At top is the edited version of the interview published by S. L. Sanger in Working on the Bomb: An Oral History of WWII Hanford, Portland State University, 1995. For the full transcript that matches the audio of the interview, please scroll down.] Book version: BUD: I was a counter-intelligence agent at Hanford. Everybody was suspi­cious […]

Los Alamos, New Mexico, was the site of Project Y, or the top-secret atomic weapons laboratory directed by J. Robert Oppenheimer. The site was so secret that one mailbox, PO Box 1663, served as the mailing address for the entire town. The mountains allowed the scientists ample opportunity to relax, by skiing, swimming, and hiking. […]

In 1942, General Leslie Groves approved Oak Ridge, Tennessee, as the site for the pilot plutonium plant and the uranium enrichment plant. Manhattan Project engineers had to quickly build a town to accommodate 30,000 workers–as well as build the enormously complex plants. “Site X” By the time President Roosevelt authorized the Manhattan Project on December […]