E. Cybert, Jr.

Douglas W. Ballard

Joseph Caldwell

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

F. J. De Franco

De Franco worked in the United States Engineer District Office.

Clifford Heflin

Colonel Clifford Heflin was a decorated member of the Armed Forces, serving in the Air Force for 31 years.