J. E. Metcalf

Acie Singleton

Acie Singleton was a laborator helper at the Metallurgical Laboratory in Chicago during the Manhattan Project.

Esther Branson

R. R. Wisner

Wisner worked for Stone and Webster Engineering Corporation.

Okey B. Ellison

Okey B. Ellison was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.