National Museum of Nuclear Science & History
Johnston worked at the 300 Area at Hanford during the Manhattan Project.
Rocco F. Serrietella served in the 393rd Bombardment Squadron.
Clarence Grover Sproul worked as a machinist on the Manhattan Project in Los Alamos, NM from January through June 1945.
D. M. Ellett is a mechanical engineer who joined the Manhattan Project after the end of World War II.
