Edward A. Smith

William A. Pope

Joseph H. Heartberg

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

C. S. Huffman

C. S. Huffman worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Fred W. Goodloe

Fred W. Goodloe was a janitor at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.