Floyd Halein

Marvand H. Kaland

Dorothea Sacher

Dorothea Sacher was a non-techical staff worker at the Metallurgical Laboratory in Chicago during the Manhattan Project.

Asa Swain

Asa Swain worked in the shop at the Metallurgical Laboratory in Chicago during the Manhattan Project.

Joseph H. Heartberg

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