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National Museum of Nuclear Science & History

Oral Histories

Yoshiro Yamawaki’s Interview

Yoshiro Yamawaki is a hibakusha, an atomic bomb survivor. He was 11 years old when the U.S. dropped the “Fat Man” atomic bomb on Nagasaki, Japan on August 9, 1945. Yamawaki’s father was killed; Yamawaki and his twin brother, who were 2.2 kilometers away from the hypocenter, survived. Today, Yamawaki shares his testimony and advocates for the elimination of nuclear weapons. In 2010 the Japanese Ministry of Foreign Affairs appointed him as a Special Communicator for a World without Nuclear Weapons. In this interview, Yamawaki recalls the day of the atomic bombing and its aftermath. He discusses how the bomb affected his family, including the health complications he and his brothers have faced, and calls for humanity to “make sure that Nagasaki is the last place on Earth to suffer an atomic bombing.”

Tatsujiro Suzuki’s Interview

Tatsujiro Suzuki is a professor and vice director at the Nagasaki University Research Center for Nuclear Weapons Abolition (RECNA). His academic work focuses on civilian nuclear energy and nonproliferation. Suzuki was previously Vice Chairman of the Japan Atomic Energy Commission. In 2014 he joined RECNA, and served as its director from 2015-2019. In this interview, Suzuki discusses his opinions on international nuclear issues and policies. He shares his views on how countries can work together to promote nuclear nonproliferation. He also describes his reflections on the Fukushima Daiichi nuclear disaster and RECNA’s current projects.

Al Zelver’s Interview

Al Zelver served as a Japanese language officer in the U.S. Army during World War II. He spent a year in Japan after the bombings of Hiroshima and Nagasaki. In this interview, Zelver talks about becoming a Japanese language officer, his time in the China-Burma-India Theater during the war, and seeing the ruins of Hiroshima shortly after the Japanese surrender. Zelver ruminates on the decision to drop the bombs and on the surrender itself. He recalls his time in Japan both immediately after the surrender and years later when he returned to Hiroshima to speak with the Hiroshima Peace Foundation. He reflects on the atomic bombings and nuclear proliferation today, and describes a conversation with Manhattan Project scientist Felix Bloch.

Esequiel Salazar’s Interview

Esequiel Salazar worked at Los Alamos during the Manhattan Project as a carpenter and a rod-man assisting surveyors for the Robert E. McKee Company. After the war, Salazar deployed as a soldier to occupied Japan and had a long career with Los Alamos National Laboratory (LANL). Combined, he and his wife contributed 100 years of service to the Los Alamos laboratory. In this interview, Salazar highlights the essential work of Hispano workers and other laboratory employees during and after the Manhattan Project. He touches on the politics surrounding contractors and labor during Los Alamos’s early years, and shares his thoughts on the Trinity Test and bombings of Hiroshima and Nagasaki. He also discusses his sons’ work at LANL and Sandia National Laboratories.

J. Samuel Walker’s Interview

J. Samuel (“Sam”) Walker is the former historian of the U.S. Nuclear Regulatory Commission and the author of “Prompt and Utter Destruction: Truman and the Use of Atomic Bombs against Japan.” In this interview, he describes the motivations behind President Truman’s decision to authorize the use of the atomic bombs. He explains the key differences between “traditionalist” and “revisionist” interpretations, and identifies weaknesses in each perspective’s argument. He also assesses the role of the Soviet declaration of war against Japan, whether the Japanese were ready to surrender before the bombs were dropped, and American plans for an invasion of mainland Japan. Walker concludes by recalling President Truman’s reaction to the human impact of the bomb.