George B. Dewitt

M.A. Spear

Spear worked at the 200 East Area at Hanford during the Manhattan Project.

W. H. Clymer

Warren I. Smith

Warren Smith worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Joseph H. Heartberg

Joseph H. Heartberg was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.