George T. Elum

W. J. Eagle

H. R. Kroegar

H. R. Kroegar worked for the Tennessee Eastman Corporation at the Y-12 Plant.

W. H. Zimmer

W. H. Zimmer worked for the United States Engineer District Office.

Leo P. Hassen

Leo P. Hassen was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.