J. A. Metcalf

Mark S. Fred

Mark Fred was a research assistant in the chemistry division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

R. R. Wisner

Wisner worked for Stone and Webster Engineering Corporation.

Pauline McGrath

Pauline McGrath was a secretary at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Martin Liebman