Foreign fighters are streaming into Syria and Iraq in unprecedented numbers to join the Islamic State or other extremist groups, including at least 3,400 from Western nations among 20,000 from around the world, U.S. intelligence officials say in an updated estimate of a top terrorism concern.
Intelligence agencies now believe that as many as 150 Americans have tried and some have succeeded in reaching in the Syrian war zone, officials told the House Homeland Security Committee in testimony prepared for delivery on Wednesday. Some of those Americans were arrested en route, some died in the area and a small number are still fighting with extremists.
The testimony and other data were obtained Tuesday by The Associated Press.
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The intelligence officials also discussed the possibility of homegrown attacks inspired by the Islamic State or al-Qaida but not directly connected to the groups. Rasmussen of the counterterrorism center appeared to downplay that threat, saying it “will remain at its current level resulting in fewer than 10 uncoordinated and unsophisticated plots annually from a pool of up to a few hundred individuals, most of whom are known to the (intelligence agencies) and law enforcement.”
McCaul said he fears the Obama administration is blind to the looming dangers of homegrown radicalism of the kind that led to the 2013 Boston Marathon bombing.
“We have no lead agency in charge of countering domestic radicalization and no line item for it in the budgets of key departments and agencies,” he said. “I am also concerned that the few programs we do have in place are far too small to confront a challenge that has grown so quickly.”
