National Museum of Nuclear Science & History
H. L. Holsopple worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Joseph Caldwell was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
J. G. Pettis worked for the Roane-Anderson Company.
Amanda Stein was a research assistant in the Chemistry Division at the Metallurgical Laboratory in Chicago during the Manhattan Project.
