Western intelligence services have been warning that European and American jihadists have been flocking to Syria to fight. But they’ve been reluctant to say how many Americans have joined the extremist forces there—until now. The latest U.S. intelligence estimates say that more than 100 Americans have joined the jihad in Syria to fight alongside Sunni terrorists there.
http://www.thedailybeast.com/articles/2014/05/20/exclusive-more-than-100-americans-are-waging-jihad-in-syria-u-s-intelligence-says.html