National Museum of Nuclear Science & History
Philip C. McKenna was a laboratory assistant the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Richard "Dick" Skancke was a security guard at Los Alamos during the Manhattan Project from late 1946 until late 1947.
Nelson C. Baker was a lieutenant working as an executive officer to Captain Palmer in the Second Provisional Special Engineer Detachment at Los Alamos.