National Museum of Nuclear Science & History
Sidney Williams was a janitor at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
Clinton B. Gass was a G.I. at Los Alamos who worked in the Special Engineer Detachment unit under the Theoretical Physics Division, headed by Dr.
Rudolph Vergath was a staff worker at Los Alamos during the Manhattan Project.
C. C. Upshall worked for the Tennessee Eastman Corporation at the Y-12 Plant.