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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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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.

Dan Millard

Oak Ridge, TN

Dan Millard was a high school student in Oak Ridge, TN in 1943. The size of the school expanded from 65 to 1200 students due to the influx of workers for the Manhatan Project.

Andrew Hanson

Los Alamos, NM

Dr. Andrew Hanson is a physicist and a Professor Emeritus of Computer Science at Indiana University, Bloomington.

Margaret “Peggy” Dickson

Oak Ridge, TN

Peggy Dickson moved to Oak Ridge in the fall of 1944, when she was 14 years old. Her father, Charles Russell Dickson, Sr.