National Museum of Nuclear Science & History
Byron Johnson worked for the Tennessee Eastman Corporation at the Y-12 Plant.
David Greenglass (1922-2014) was a machinist and member of the Special Engineer Detachment who engaged in espionage activities for the Soviet Union at Los Alamos during the Manhattan Project.
Paul W. Walk served in the 393rd Bombardment Squadron.
Howard Parsons was an American physicist. Parsons was born in Chicago in 1920. He receieved a B.S. from the University of Chicago, and shortly afterwards was hired to work on the Manhattan Project as a research assistant at the Chicago Met Lab.
Cathcart worked at the 200 East Area at Hanford during the Manhattan Project.
