National Museum of Nuclear Science & History
Sherwood Johnston worked for the Roane-Anderson Company.
Pef worked for Stone and Webster Engineering Corporation.
Robert Harrison was an engineer in the Special Engineering Detachment (SED) in Oak Ridge, Tennessee from August 1944 to August 1945.
Leo Wojtanowski worked in a shop at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
