National Museum of Nuclear Science & History
Clarence Grover Sproul worked as a machinist on the Manhattan Project in Los Alamos, NM from January through June 1945.
Robert A. Lewis served as a captain in the 393rd Bombardment Squadron of the 509th Composite Group. He trained in Wendover, Utah before leaving for Tinian Island.
John W. Burr was a research assistant in the Metallurgical Laboratory (“Met Lab”) at the University of Chicago during the Manhattan Project.
F. J. Underwood worked for the Roane-Anderson Company.