Federal Bureau of Investigation Director James Comey, and Department of Homeland Security Secretary Jeh Johnson, right, talk before the start of a House Homeland Security Full Committee hearing on Capitol Hill in Washington, Wednesday, Sept. 17, 2014. The U.S. is able to track Westerners who travel to and from Syria, Homeland Security Secretary Jeh Johnson said. But inside Syria, there are intelligence gaps. (AP Photo/Manuel Balce Ceneta)
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