National Museum of Nuclear Science & History
Flonnie Sloan worked in Building 9201 in the Y-12 plant at Oak Ridge, Tennessee from 1943 to 1945.
Hart worked at the 300 Area at Hanford during the Manhattan Project
Armstrong worked at the 200 West and 300 Areas at Hanford during the Manhattan Project.
E. C. Harshbarger worked for the Roane-Anderson Company.