National Museum of Nuclear Science & History
Grover Thompson worked for the United States Engineer District Office.
Clarence Grover Sproul worked as a machinist on the Manhattan Project in Los Alamos, NM from January through June 1945.
Charles B. Rinard served in the 393rd Bombardment Squadron.
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.
