Philip Zimbardo: Here are the prisoners who are going to be dehumanized. They're going to become numbers. Here are the guards with the symbols of power and anonymity. Guards get prisoners to clean the toilet bowls out with their bare hands, to do other humiliating tasks. They strip them naked. They sexually taunt them. They begin to do degrading activities, like having them simulate sodomy. You saw simulating fellatio in soldiers in Abu Ghraib. My guards did it in five days. The stress reaction was so extreme that normal kids we picked because they were healthy had breakdowns within 36 hours. The study ended after six days, because it was out of control. Five kids had emotional breakdowns.