** FILE ** John Brennan, assistant to the president for homeland security and counterterrorism, speaks at the Intelligence and National Security Alliance conference in Washington on Wednesday, Sept. 7, 2011. (AP Photo/Susan Walsh)

Photo by: Susan Walsh

** FILE ** John Brennan, assistant to the president for homeland security and counterterrorism, speaks at the Intelligence and National Security Alliance conference in Washington on Wednesday, Sept. 7, 2011. (AP Photo/Susan Walsh)