National Museum of Nuclear Science & History
Harper worked for Stone and Webster Engineering Corporation.
Christiansen worked at the 200 West Area at Hanford during the Manhattan Project.
Jim Johnson was an ordnanceman at Los Alamos from 1944 to 1945. He was born on January 8, 1926, and started work at the Naval Ordnance Test Station at China Lake, Califiornia in 1944.
