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National Museum of Nuclear Science & History

Oral Histories

Robert Krauss’s Interview

Robert “Bob” Krauss is the Official Historian of the 509th Composite Group. He and his wife, Amelia Krauss, published The 509th Remembered, which profiles the service members of the 509th Composite Group and the events that surrounded the group and its role in dropping the atomic bombs on Hiroshima and Nagasaki. In this interview, Krauss discusses how he became interested in collecting and preserving the history of the 509th and became the official historian for the 509th CG. He also narrates the stories of airmen from the 509th Composite Group and recounts his relationship with some of the airmen, including Donald Albury, Ray Gallagher, Fred Olivi, Paul Tibbets, and others. He reflects on the atomic bombings, the legacy of the Manhattan Project, and visiting some of the Manhattan Project sites today.

Russell E. Gackenbach’s Interview

Russell E. Gackenbach was a navigator in the 393rd Bombardment Squadron. He flew on both the Hiroshima and Nagasaki missions. His crew flew aboard the Necessary Evil, which was the camera plane for the Hiroshima mission. Gackenbach photographed the mushroom cloud over Hiroshima. His crew flew again during the Nagasaki mission as the weather reconnaissance plane for the city of Kokura. In this interview, Gackenbach describes his wartime experiences, from enlisting in the service, to training in Wendover, UT and Cuba with the modified B-29s, to flying on both atomic bomb missions. He recalls the personalities of other members and leaders in the 509th, including Col. Paul Tibbets and his crew pilot, Capt. George Marquardt. He also describes his life after the war, including being honored at a Tampa Bay Buccaneers game as their “hero of the day” and participating in 509th reunions around the country.