“I know from personal experience that the abuse of prisoners will produce more bad than good intelligence. I know that victims of torture will offer intentionally misleading information if they think their captors will believe it. I know they will say whatever they think their torturers want them to say if they believe it will stop their suffering. Most of all, I know the use of torture compromises that which most distinguishes us from our enemies, our belief that all people, even captured enemies, possess basic human rights, which are protected by international conventions the U.S. not only joined, but for the most part authored.

Full transcript: http://www.mccain.senate.gov/public/index.cfm/2014/12/floor-statement-by-sen-mccain-on-senate-intelligence-committee-report-on-cia-interrogation-methods