Source:
WPShortly after the first accused terrorists reached the U.S. naval prison at Guantanamo Bay, Cuba, on Jan. 11, 2002, a delegation from CIA headquarters arrived in the Situation Room. The agency presented a delicate problem to White House counsel Alberto R. Gonzales, a man with next to no experience on the subject. Vice President Cheney's lawyer, who had a great deal of experience, sat nearby. The meeting marked "the first time that the issue of interrogations comes up" among top-ranking White House officials, recalled John C. Yoo, who represented the Justice Department. "The CIA guys said, 'We're going to have some real difficulties getting actionable intelligence from detainees'" if interrogators confined themselves to humane techniques allowed by the Geneva Conventions.
From that moment, well before previous accounts have suggested, Cheney turned his attention to the practical business of crushing a captive's will to resist. The vice president's office played a central role in shattering limits on coercion in U.S. custody, commissioning and defending legal opinions that the Bush administration has since portrayed as the initiatives, months later, of lower-ranking officials
Cheney and his allies, according to more than two dozen current and former officials, pioneered a novel distinction between forbidden "torture" and permitted use of "cruel, inhuman or degrading" methods of questioning. They did not originate every idea to rewrite or reinterpret the law, but fresh accounts from participants show that they translated muscular theories, from Yoo and others, into the operational language of government.
A backlash beginning in 2004, after reports of abuse leaked out of Iraq's Abu Ghraib prison and Guantanamo Bay, brought what appeared to be sharp reversals in courts and Congress -- for both Cheney's claims of executive supremacy and his unyielding defense of what he called "robust interrogation."
Read more:
http://blog.washingtonpost.com/cheney/chapters/pushing_the_envelope_on_presi/index.html
the article is long, but definitely worth a read.