CNN New Day Saturday May 31, 2014 11:02:00
Planned the 9/11 attacks, and they have reason to be, concerned. >> reporter: at least 100 americans flooded into syria since the start of the civil war, and u.s. ish tos fear many more may already be joining a bloody belgts, getting expert training how to plot attacks once back in the u.s. >> syria remains a significant destination for our home-grown violent extremist population. >> reporter: even more frightening, sources say, it's a group becoming increasingly difficult to track. >> there isn't a single easily identifiable community from which our syria travelers all spring from. they are a...
Source: archive.org