Walter H. Thompson

Joseph LaRocco

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

Robert R. Rumer

Robert Rumer worked for the United States Engineer District Office.

George Maronde

George Maronde was a security guard at the University of Chicago Metallurgical Lab. He stood guard outside Stagg Field when Chicago Pile-1 went critical on December 2, 1942.

Theodore F. Harlow