From "The Gray Zone" by Seymour Hersh:
http://www.newyorker.com/fact/content/?040524fa_fact(Major General Geoffrey) Miller’s concept, as it emerged in recent Senate hearings, was to “Gitmoize” the prison system in Iraq—to make it more focussed on interrogation. He also briefed military commanders in Iraq on the interrogation methods used in Cuba—methods that could, with special approval, include sleep deprivation, exposure to extremes of cold and heat, and placing prisoners in “stress positions” for agonizing lengths of time. (The Bush Administration had unilaterally declared Al Qaeda and other captured members of international terrorist networks to be illegal combatants, and not eligible for the protection of the Geneva Conventions.)
(Defense Secretary Donald) Rumsfeld and (intelligence officer Stephen) Cambone went a step further, however: they expanded the scope of the sap, bringing its unconventional methods to Abu Ghraib. The commandos were to operate in Iraq as they had in Afghanistan. The male prisoners could be treated roughly, and exposed to sexual humiliation.