A re-printing of a U.S. News & World Report of John McCain's first-hand account of his time as a POW.
According to Wikipedia:
In August 1968, a program of severe torture began on McCain. He was subjected to rope bindings and repeated beatings every two hours, at the same time as he was suffering from dysentery. Further injuries led to the beginning of a suicide attempt, which was stopped by guards.
After four days, McCain made an anti-American propaganda "confession". He has always felt that his statement was dishonorable, but as he would later write, "I had learned what we all learned over there: Every man has his breaking point. I had reached mine." His injuries left him permanently incapable of raising his arms above his head. He subsequently received two to three beatings per week because of his continued refusal to sign additional statements.