National Museum of Nuclear Science & History
Harold Seward worked for the Roane-Anderson Company.
Charles O’Neil was a staff worker at Los Alamos during the Manhattan Project.
Larrie Arnold worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Fredrika Lewis was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
M. A. Obermeyer worked for the J.A. Jones Construction Company.
