National Museum of Nuclear Science & History
James Roberts was a research assistant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Takala worked at the 100-F Area at Hanford during the Manhattan Project.
Daniel Pfaff was a staff worker at Los Alamos during the Manhattan Project.
Charles Russell Dickson worked for the Manhattan Project civilian contractor Tennesee Eastman Corporation as an administrative assistant from 1943 to 1946.