R. J. Lanches

Joseph LaRocco

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

G. A. Olson

H. L. Huffman

H. L. Huffman worked for the Roane-Anderson Company.

E. H. Halbrook

E. H. Halbrook worked for the J.A. Jones Construction Company.