National Museum of Nuclear Science & History
Harry Stephon was a gruard and sergeant in the U.S. Army at the Metallurgical Laboratory in Chicago during the Manhattan Project.
J. A. Speas worked for the J.A. Jones Construction Company.
L. C. Blitzblace worked for the Roane-Anderson Company.
Helen Thomson was a techinician in the Chemistry Division at the Metallurgical Laboratory in Chicago during the Manhattan Project.
