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National Museum of Nuclear Science & History

Crawford Greenewalt, Jr., was an archeologist and the son of Crawford Greenewalt, a chemical engineer who worked on the Manhattan Project and later become president of the DuPont Company. 

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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.

Robert Howes Jr.

Los Alamos, NM

Robert I. Howes Jr. is an American physicist. He was born in Santa Fe, New Mexico in 1941, and was less than two years old when his father Robert Ingersoll Howes joined the Manhattan Project at Los Alamos.

Jack Keen

Hanford, WA

Jack Keen is the son of Lester Orlan Keen, an engineering draftsman at Hanford during the Manhattan Project.

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.