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National Museum of Nuclear Science & History

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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Crawford H. Greenewalt

Hanford, WA

Crawford Greenewalt (1902-1993) was an American chemical engineer. He was one of the managers of the Manhattan Project for DuPont.

Gale Young

Chicago, IL

Gale Young was a research associate in theoretical studies at the University of Chicago Met Lab. Before joining the Manhattan Project in 1942, Young taught mathematics and physics at Olivet College.

Dimas Chavez

Los Alamos, NM

Dimas Chavez was a young child when he moved to Los Alamos with his family in August 1943. Chavez’s father, Trinidad, joined the Zia Company at Los Alamos, where he helped construct and maintain the laboratories and facilities there.

Margaret Norman

University of California, Berkeley

Margaret Lawrence Norman is the eldest daughter of Nobel Prize-winning physicist Ernest O. Lawrence. She was born in Oakland, CA, and attended Stanford University.