National Museum of Nuclear Science & History
J. W. Litton worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Hollis worked for Stone and Webster Engineering Corporation.
Roger Hildebrand is an American physicist and Manhattan Project veteran. He is the S.K. Allison Distinguished Service Professor, Emeritus, at the University of Chicago and is affiliated with the Enrico Fermi Institute.
Wangelin worked at the 200 East and 200 West Areas at Hanford during the Manhattan Project.