Hack,
The abuse and humiliation actually took place at 3 prisons in the Baghdad area. This was not done by accident, it was a planned, systematic way to break down the prisoners will to resist any interrogation, degrade them and then blackmail them into working for US Intelligence.
The pictures were taken as a way to intimidate the prisoner and then keep them working as low level collectors (if they did not the pictures would have been released to their family and tribes) Videos were also made as a way to record the "success" to be used as a teaching tool at Fort Huachuca (to train future interrogators). The MPs and Interrogators were told the Geneva Convention did not apply to Iraq Soldiers and Civilian Detainees. The methods the MPs used were actually taught to the MPs by military intelligence professionals and civilian contractors. This was a sanctioned operation and the methods were known to be used by Generals in the chain of command. Women MPs were sought out to further humiliate the Iraqi prisoners. The female MPs who accepted the jobs, conducted degrading acts upon the Iraq men, because such acts by women on men in the Arab culture are so humiliating, it was thought that the men would then talk just to stop the abuse by the female MPs. This abuse was done in stages and the less cooperative Iraqis were given the more degrading abuse to condition them to interrogation. The Major General (Barbara Fast) in charge of the MI personnel in Baghdad sanctioned this treatment.
http://www.sftt.org/cgi-bin/csNews/csNews.cgi?database=Hacks%20Target%20Feedback%202004.db&command=viewone&op=t&id=13&rnd=576.7437804720015