Fact Sheet: Comprehensive U.S. Government Approach to Foreign Terrorist Fighters in Syria and the Broader Region [open pdf - 194KB]
"As the President has said, we take seriously the terrorist threat posed by fighters in Iraq, Syria, and the broader region, including foreign terrorist fighters. More than 15,000 foreign terrorist fighters from more than 80 countries have traveled to Syria to fight alongside terrorist groups including dozens of Americans from a variety of backgrounds. The White House is leading an interagency effort to address this threat. Our approach brings together homeland security, law enforcement, intelligence, diplomatic, military, capacity building, and information sharing efforts."
U.S. Office of the White House Press Secretary: http://www.whitehouse.gov/