National Museum of Nuclear Science & History
O’Black worked in the 200 East Area at Hanford during the Manhattan Project.
Katherine Gnjec was a laboratory assistant in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Armstrong worked at the 200 West and 300 Areas at Hanford during the Manhattan Project.
Henry L. Smith served in the 393rd Bombardment Squadron.
