National Museum of Nuclear Science & History
O. T. Sibert worked for Clinton Laboratories at the X-10 Reactor.
Mack worked at the 300 Area at Hanford during the Manhattan Project.
Edward Wiggers was a staff worker at Los Alamos during the Manhattan Project.
Grace R. Harvey was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.