Frank C. Cook

Mary H. Rudloff

Mary Rudloff worked for the United States Engineer District Office.

William D. Steadman

William Steadman was a guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.

H. S. Cline

T. J. O’Donnell

T. J. O’Donnell was the Shop Chief at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.