National Museum of Nuclear Science & History
Clarence Grover Sproul worked as a machinist on the Manhattan Project in Los Alamos, NM from January through June 1945.
Lillie May Porter was laboratory assistant in the Chemistry Division of the Chicago Met Lab during the Manhattan Project.
Petty worked in the 100 B and D Areas at Hanford during the Manhattan Project.
Willard worked at the 300 Area at Hanford during the Manhattan Project.