National Museum of Nuclear Science & History
Frank Vaughan was a research associate at the Chicago Met Lab during the Manhattan Project.
James S. Cole is an American engineer. He served as an airplane engineer during World War II, and began working at the K-25 plant at Oak Ridge, TN in 1945, shortly after the end of the war.
Vaughn Wrenn worked for the Roane-Anderson Company.
John P. Engel served in the 1st Ordnance Squadron.
Vivian Olum was a staff worker at Los Alamos during the Manhattan Project. She was married to physicist Paul Olum.