John Brennan, nominated to lead the CIA, is one of the few administration officials who has publicly supported the use of controversial interrogation techniques and drone strikes.
In White House councils, John Brennan has been privy to the most secret U.S. intelligence programs. Outwardly, he has been the administration's most public defender of one of President Barack Obama's most controversial practices -- the expanded use of armed drone aircraft to kill terrorism suspects overseas.
This is the second time that Obama has sought to put Brennan at the helm of the CIA, and his confirmation process is likely to revisit old controversies over U.S. counterterrorism measures undertaken by the administrations of Obama and George W. Bush.
Brennan, a 25-year CIA veteran, withdrew his name from consideration as Obama's first director of the agency in November 2008 following liberals' criticism that he had done too little to condemn the use by the Bush administration of interrogation techniques such as waterboarding, widely considered torture.
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