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National Museum of Nuclear Science & History

Nancy Greenewalt Frederick

Child of Manhattan Project VeteranWilmington, DE

Family Member of Manhattan Project Veteran
Nancy Greenewalt Frederick Listen to Nancy Greenewalt Frederick’s Oral History on Voices of the Manhattan Project

Nancy Greenewalt Frederick is the oldest daughter of Crawford Greenewalt, a chemical engineer who worked on the Manhattan Project and later become president of the DuPont Company. 

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Judith Lynn Parkhurst

Oak Ridge, TN

Judith Lynn Parkhurst was born on March 18, 1934, in Shelbyville, Indiana. Judith had two brothers, James born in 1941, and David born at Oak Ridge in 1947.

Catherine Dvorak

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Cathy Dvorak’s is the daughter of Colonel Clifford Heflin, the Commanding Officer of Wendover Air Base.

Charles Oppenheimer

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Charles Oppenheimer (1975- ) is the grandson of J. Robert Oppenheimer. Although Charles Oppenheimer never met his grandfather, he is well versed in the family history.

Raymond C. Grills

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Raymond C. Grills is an American physical chemist who worked at the University of Chicago’s Metallurgical Laboratory and at Hanford during the Manhattan Project.