National Museum of Nuclear Science & History
William Hester worked for the Roane-Anderson Company.
Fredrick “Fred” D. Johnson was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
T. M. Yakimchick worked for the United States Engineer District Office.
W. C. Marr worked for the Tennessee Eastman Corporation at the Y-12 Plant.
