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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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Nancy Greenewalt Frederick

Wilmington, DE

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.

Ernest Tremmel

Washington, DC

Ernest (Ernie) Tremmel was born on September 20, 1916 in Wisconsin. He graduated from the University of Wisconsin-Madison with a B.

Dunell Cohn

Oak Ridge, TN

Dunell Cohn was born in Oak Ridge, Tennessee, in 1944. Cohn’s father, Waldo, was recruited to work on the Manhattan Project in Chicago in 1942 for his work on radioisotopes at Berkeley and Harvard during the 1930s.

Mary Kennedy

Oak Ridge, TN

When she was fifteen, Mary (Whittlesey) Kennedy moved to Oak Ridge after her mother, Kleber Whittlesey, had secured a job as a secretary there.