National Museum of Nuclear Science & History
Armstrong worked at the 200 West and 300 Areas at Hanford during the Manhattan Project.
Jacob Epting worked as a carpenter in Oak Ridge, TN from November 1942 to October 1943. While Epting assumed he was building a hospital, he was never formally told about the project he was working on.
Roger S. Warner, Jr. was a civilian scientist who worked as part of Project Alberta, the team that transported and assembled all the components of the two atomic bombs before the August 1945 bombings of Hiroshima and Nagasaki.
L. L. Larson worked for Clinton Laboratories at the X-10 Reactor.