There are growing concerns over Americans who traveled to fight in Syria planning to return home to launch attacks here. The FBI and the U.S. Intelligence community are working to track these individuals. Barbara Starr has new details on why this investigation is so complicated.
Anderson discussed the dangers of fighters who carry U.S. passports with National Security Analyst Fran Townsend, CIA and FBI counterterrorism official Philip Mudd and counterterrorism veteran Robert McFadden.
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
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