National Museum of Nuclear Science & History
P. D. Simpson worked for the Poe Piping & Heating Company.
B. L. Brown worked for the Fercleve Corporation.
Clarence W. Hartman served in the 393rd Bombardment Squadron.
John Costa worked at the shop in the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Leandro Ortiz was a staff worker at Los Alamos during the Manhattan Project.
