[20140919]IN10154_美国外国战斗人员和伊斯兰国：联邦执法面临的广泛挑战.pdf

CRS InsightsAmerican Foreign Fighters and the Islamic State: Broad Challenges for Federal Law EnforcementJerome P. Bjelopera, Specialist in Organized Crime and Terrorism (jbjeloperacrs.loc.gov, 7-0622)September 19, 2014 (IN10154)The Department of Homeland Security (DHS) has assessed that the terrorist group known as theIslamic State (IS, previously referred to as ISIS or ISIL) currently poses no specific or credible threat tothe homeland. The Director of the National Counterterrorism Center (NCTC), Matthew G. Olsen, hasalso noted that, any threat to the U.S. homeland from these types of extremists is likely to be limitedin scope and scale, perhaps involving individuals acting without specific IS direction. In this vein,policy makers continue to voice concerns about American IS fighters who may leave Syria or Iraq,return to the United States, and strike targets on their own at home. This CRS Insight offers aframework for considering the challenges to domestic security posed by American IS fighters andoutlines some of the ways that U.S. law enforcement responds to such challenges.Foreign Fightersare American citizens, legal permanent residents, or aliens who radicalized in theUnited