National Museum of Nuclear Science & History
Parsons worked in the 300 Area at Hanford during the Manhattan Project.
Clarence Grover Sproul worked as a machinist on the Manhattan Project in Los Alamos, NM from January through June 1945.
Cannon worked for Stone and Webster Engineering Corporation.
Theodore Boinski (1920-2008) was a laboratory assistant at the Metallurgical Laboratory in Chicago during the Manhattan Project.