National Museum of Nuclear Science & History
Delbert Ball was a procurement officer at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Bonbrake worked at Los Alamos during the Manhattan Project.
Mack worked at the 300 Area at Hanford during the Manhattan Project.
Minnie M. Daniels was a laboratory technician and assistant in the Chemistry Division at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.