National Museum of Nuclear Science & History
S. M. MacNeille worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Helena Calloway was a laboratory assistant in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
R. T. Bartnett worked for the Roane-Anderson Company.
Agnes Ryan was a staff worker at Los Alamos during the Manhattan Project.
