For just one example of the "proven track record" of water boarding, consider the case of suspected terrorist Ibn al-Shaykh al-Libi. After being wrapped in duct tape and stored in a plywood box "for his own protection," the FBI transported al-Libi to Cairo for questioning by experts in "'enhanced' interrogation techniques." After a water boarding session, al-Libi confessed that Iraq had trained Al-Qaeda in the manufacture of bombs and poison gas. Secretary of State Colin Powell used this incontrovertible information as proof positive when he informed the U.N. of the "sinister nexus" between Iraq and Al-Qaeda.
Al-Libi later recanted his "confession" as having been under duress, and the CIA confirmed its falsity.