National Museum of Nuclear Science & History
Barton B. Crespin served as a private first class in the 393rd Bombardment Squadron. He was a member of the ground crew regularly assigned to the B-29 Necessary Evil.
C. H. Hemmel, Jr. served in the 390th Air Service Group.
E. H. Marsden worked for the United States Engineer District Office.
Frances T. Janis was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
