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 400 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

General Paul Tibbets - Reflections on Hiroshima

General Paul Tibbets – Reflections on Hiroshima

Colonel (later General) Paul Tibbets was the pilot of the Enola Gay, the B-29 that dropped the “Little Boy” atomic bomb over Hiroshima on August 6, 1945. In this documentary Tibbets co-produced with the Buckeye Aviation Book Company, “Reflections on Hiroshima,” he recounts his memories of the day the atomic bomb was first used in warfare. Tibbets recalls how he became a pilot, and explains how the Manhattan Project’s “Silverplate” program produced a special version of the B-29 capable of delivering the atomic bomb. He also discusses the target selection process and describes the “odd couple” of J. Robert Oppenheimer and General Leslie Groves. He remembers seeing the mushroom cloud over Hiroshima and feeling the shock wave of the blast, and shares his views on the role of morality during war.

Rosario Martinez Fiorillo's Interview

Rosario Martinez Fiorillo's Interview

Rosario Martinez Fiorillo grew up in northern New Mexico during the Manhattan Project. Her ancestors were Hispano homesteaders who built the Romero Cabin, an important pre-Manhattan Project structure at Los Alamos. In this interview, she reflects on her experiences living in the village of Guachupangue, and recalls an Army convoy passing by her house before the Trinity Test. She describes the history of the Romero Cabin and how her grandparents were evicted by the U.S. government for the Manhattan Project. Martinez Fiorillo explains why she decided not to work at Los Alamos, and concludes by talking about her life as a bilingual education teacher in California and New Mexico.

Milton Levenson's Interview

Milton Levenson's Interview

Milton Levenson is an American chemical engineer and former president of the American Nuclear Society who has worked in the nuclear energy field for more than 60 years. During the Manhattan Project, he worked at Decatur, IL, and Oak Ridge, TN, where he was a supervisor at the X-10 plant. In this interview, he describes how he joined the Manhattan Project and his experiences at Oak Ridge, including his memories of segregation there. Levenson then talks about his post-war career as an expert on nuclear safety, including his role in responding to the SL-1, Three Mile Island, and Chernobyl accidents. He also recalls having to tell Enrico Fermi that he could not perform an experiment for safety reasons.

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.