National Museum of Nuclear Science & History
Lloyd J. Williams was a staff worker at Los Alamos during the Manhattan Project.
C. E. Stone worked for Clinton Laboratories at the X-10 Reactor.
Arthur Watmough was an electrical engineer working for the DuPont Chamberworks Company in New Jersey from 1941 to 1947.
Johnson worked at the 100-B Area at Hanford during the Manhattan Project.