The Manhattan Project

Manhattan Project Voices

Voices of the Manhattan Project

Chicago Pile-1 scientists"Voices of the Manhattan Project" is a joint project by the Atomic Heritage Foundation and the Los Alamos Historical Society to create a public archive of our oral history collections of Manhattan Project veterans and their families. 

Our online collection features 500 audio/visual interviews with Manhattan Project workers and their families, including J. Robert Oppenheimer, General Leslie R. Groves, Glenn Seaborg, Hans and Rose Bethe, George and Vera Kistiakowsky, and many more. We add new interviews every week, so check back often! 

"Voices" now includes interviews with some of the men who flew on the bombing missions.

Recent Oral Histories

Clifton Truman Daniel's Interview

Clifton Truman Daniel's Interview

Clifton Truman Daniel is the grandson of President Harry Truman. In this interview, Daniel discusses what it is like to be the grandson of the distinguished president. He recalls his relationship with his grandparents and his mother, Margaret Truman Daniel, and how he learned that “Grandpa” had been president. In addition to discussing the work that he does on behalf of the Truman Presidential Library, Daniel also speaks about the more recent trips he has made to Japan and meeting with survivors of the atomic bombings of Hiroshima and Nagasaki. He describes his friendships with survivor Setsuko Thurlow and with the family of Sadako Sasaki.

Mary Kennedy's Interview

Mary Kennedy's Interview

Mary Whittlesey Kennedy moved to Oak Ridge as a teenager in 1943 when her mother took a job there. In this interview, Mary discusses her years at Oak Ridge including her high school, school dances, and her involvement in clubs such as “the Penguin Club.” She fondly recalls her time in Oak Ridge. She also remembers her mixed reaction to the news of the atomic bomb and how her opinion has changed over the years.

Jim Eckles' Interview

Jim Eckles' Interview

Jim Eckles worked for decades for the White Sands Missile Range Public Affairs Office, managing open houses and tours of the Trinity site, where the world’s first nuclear test took place. In this interview, Eckles describes the history of Trinity site. He discusses the ranchers who lived on it before the Manhattan Project took over, the buildings used by the scientists, and what it was like to live on the site before and during the war. He provides an overview of the Trinity Test and the “Gadget,” 100 ton TNT test, and the making of “Jumbo.” Eckles also discusses some of the key workers at Trinity site, including scientists, technicians, photographers, and MPs. He also explains some of the controversy around the site, including radiation levels, concerns over fallout from the test, and the atomic bombings of Japan.

J. Robert Oppenheimer's Interview

In this rare interview, J. Robert Oppenheimer talks about the organization of the Manhattan Project and some of the scientists that he helped to recruit during the earliest days of the project. Oppenheimer discusses some of the biggest challenges that scientists faced during the project, including developing a sound method for implosion and purifying plutonium, which he declares was the most difficult aspect of the project. He discusses the chronology of the project and his first conversation with General Leslie Groves. Oppenheimer recalls his daily routine at Los Alamos, including taking his son Peter to nursery school.