National Museum of Nuclear Science & History
J. F. Carpenter worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Jack L. Callan was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
C. L. Stewart worked for the Union Carbide & Carbon Corporation.
Leonard Krouldis was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
