National Museum of Nuclear Science & History
W. F. Johnson worked for the J.A. Jones Construction Company.
MacDonald was a member of the Instrument Section at the University of Chicago’s Metallurgical Laboratory.
R. C. Knox worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Howard Muller was a staff worker at Los Alamos during the Manhattan Project.
Per E. Carlson served in the 603rd Air Engineering Squadron.
