National Museum of Nuclear Science & History
W. H. MacDonald worked for the Union Carbide & Carbon Corporation.
Gordon Smith was a chemical engineer in the 9812th Technical Service Unit of the U. S. Army Corps of Engineers Special Engineer Detacment at the Clinton Engineer Works in Oak Ridge.
Mathias A. Klinger was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
J. M. Holliday worked for the J.A. Jones Construction Company.
