National Museum of Nuclear Science & History
H. H. Maples worked for the Roane-Anderson Company.
Hatfield worked in the United States Engineer District Office.
Helen R. Hughes was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
William Spindel was a member of the Special Engineer Detachments at Oak Ridge and Los Alamos. Spindel worked in a group that helped make coatings for the implosion bomb.
