National Museum of Nuclear Science & History
Robert Ball was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Sara Groves worked for the Roane-Anderson Company.
James Murray was a security officer at Los Alamos during the Manhattan Project. He led a plainclothes operation under the pseudonym Paul Sheridan, and suspected J.
J. J. Combes worked for the Kellex Corporation at the K-25 Plant.
Smith worked at the 200 West Area at Hanford during the Manhattan Project.