Aristotle said that although we love both truth and our friends, piety requires us to love truth more. It's likely that Army Sgt. Joseph Darby never came upon these words, but he lived by them in putting a stop to the Abu Ghraib prison-abuse scandal. "These people were my friends," Darby testified on Friday. "It's a hard call to have to make the decision to put your friends in prison." It is, but for a person of character it's even harder to sit idle while your cohorts abuse other human beings for amusement.