George F. Popp

Robert W. Mitro

Evelyn O. Gaston

Evelyn O. Gaston was a laboratory technician in the Health Division at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

L.A. Johnston

Johnston worked at the 300 Area at Hanford during the Manhattan Project.

Manuel L. Romero

Manuel Romero was a staff worker at Los Alamos during the Manhattan Project.