John J. Kroes

Marian S. Baumann

Marian S. Baumann was a laboratory technician at the Metallurgical Laboratory in Chicago during the Manhattan Project.

Luin W. Hough

Luin W. Hough was a photographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Harold W. Holman

Eric Swanson

Eric Swanson worked for the Tennessee Eastman Corporation at the Y-12 Plant.