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Tap Code shares never-before-told details of underground operations during the Vietnam War. Written in his own words, it follows the story of downed U.S. pilot Carlyle “Smitty” Harris & his time in the infamous Hoa Lo prison, nicknamed the “Hanoi Hilton.” Once inside with no hope of rescue or escape, Harris remembered the Tap Code, an old, long-unused World War II method of communication through tapping on a common water pipe. He covertly taught the code to many POWs, and in turn they taught others. It became a lifeline during their internment—a morale booster and a way to communicate the chain of command that would be instrumental in helping them prevail over a brutal enemy.
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