Rao H. Bateman

Conrad W. Roescke

Conrad Roescke was a staff worker at Los Alamos during the Manhattan Project.

Cora Cragin

Opaline Calhoun

Opaline Calhoun was a laboratory technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Carrie Johnson

Carrie Johnson was a laboratory assistant in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.