FILE - In this Monday, Aug. 17, 2009 file photo, protesters confront John Yoo, a constitutional law professor at the University of California, Berkeley, as he makes his way to a classroom in Berkeley, Calif. About 75 demonstrators called for the university to fire Yoo, a former Bush administration attorney, who wrote legal memos used to support harsh interrogation techniques that critics say constituted torture. As deputy assistant attorney general in the Justice Department’s Office of Legal Counsel, Yoo provided much of the legal underpinning for the War on Terrorism. He argued that “enemy combatants” captured in Afghanistan need not be given prisoner of war status; that the president could authorize warrantless wiretaps of U.S. citizens on American soil; that the use of “enhanced interrogation techniques” like waterboarding was within the power of the president during wartime. (AP Photo/Noah Berger)