National Museum of Nuclear Science & History
Paul Sperling was a staff worker at Los Alamos during the Manhattan Project.
Franklin B. O’Hara served in the 1st Ordnance Squadron.
E. H. Grey worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Andrew H. MacMahon was the Chief Property Officer of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
