National Museum of Nuclear Science & History
Johnie Zaring was a staff worker at Los Alamos during the Manhattan project.
H. R. Chapman worked for the H. K. Ferguson Company.
Charles Cooper was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Antilla worked in the United States Engineer District Office.
Thomas Braswell worked on the assembly line for Mallinckrodt Chemical, a civilian contractor for the Manhattan Project in St.