151013-F-NL936-421
On April 4, 1965 Ret. Col. Carlyle "Smitty" Harris was on a bombing run on the Ham Rong Bridge in Than Hoa, Vietnam, when his aircraft was shot down. Harris had become a prisoner of war and spent almost 8 years before he was released Feb. 12, 1973. During his time as a POW, Harris is credited with teaching other POWs tap code, a form of communication which was used to communicate with each other. (U.S. Air Force photo/Staff Sgt. Andrew Lee)