states. translator: we will strike america and it s stronghold washington. reporter: they warned the terror group has a lethal external operations agenda and what happen in paris will likely be attempted elsewhere. i would anticipate that this is not the only operation that isil has in the pipeline. reporter: following the attacks in paris, police departments in several major cities across the united states have ramped up security. in washington d.c., metropolitan transit police stepping up patrols on public transportation using bomb sniffing dogs and additional bag screening. in new york city, 200 highly trained elite counter terror forces deployed to protect crowded places. a force that will ultimately total 500 tactical officers. the assignment puts you and volunteered that assignment. there is no more essential assignment in the world of policing. reporter: so-called soft target venues are increasing security. the nfl which already uses