now learning in turkey. in france alone hundreds of raids. there have been arrests across the board and then these three arrests we re learning about in turkey. in terms of a connection and just how widespread this net is, how does that add to the difficulty of this task? because we re seeing these parts play out literally across the globe. i think you re right. i think the fact that we are seeing this investigation unfold not just in france, where the attacks happened, but in brussels in lockdown right now. over in turkey we have u.s. law enforcement on alert, you know, in cities like new york and d.c. and probably share intelligence. this does make it more difficult because no matter how and between the united states and our allies overseas in order to make sure we can connect the dots because just because the intelligence may be there to prevent a particular attack it doesn t mean the steps will happen to coordinate and stop it
the 9/11 attacks on the american homeland. with u.s. law enforcement on alert, the domestic threat from isis is one more challenge. abc s pierre thomas has the story. reporter: dangerous times. there is a lot of moving parts. a lot of things going on. and obviously that s cause for concern for the intelligence community and for law enforcement as well. reporter: as the u.s. bombs isis radicals and contemplates a full-scale assault on the group in syria, intelligence officials know isis may try to respond with an attack. but as isis dominates the headlines, it is far from the only threat u.s. officials have to deal with. there are multitude of emerging threats, many growing out of syria which has become a melting pot of converging radicals. we have brothers from bangladesh, iraq, cambodia, australia, u.k. two additional threats added of significance since my appointment in january, isis and certainly the syrian war engagement. reporter: american officials continue to worry a