Lance Armstrong is only the latest public figure forced to make public and sometimes painful confessions.
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A decorated war hero, Gen. David Petraeus resigned as director of the CIA in November 2012 after an FBI investigation uncovered an extramarital affair he had with his biographer, Paula Broadwell. "After being married for over 37 years, I showed extremely poor judgment by engaging in an extramarital affair," Petraeus confessed in a letter to CIA staff.