National Museum of Nuclear Science & History
John M. Sprecher was a chemical engineer. During the Manhattan Project, he worked for DuPont in Wilmington, DE.
Vivian Stark was a laboratory technician in the Health Division at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Edwin M. Bell served as a staff sergeant in the 393rd Bombardment Squadron.
Steinbach worked for Stone and Webster Engineering Corporation.
