for us. should we be freaked out by this? how should we feel about this isis attack that more attacks will come on american soil? >> there's no doubt there's significant concern right now. we've seen more than 30 americans charged for material support for isis in the last several months we've seen five isis inspired plots in the united states. some of them more aspirational than others. we saw that hatch attack on the nypd back in october. there were guys in brooklyn arrested talking about attacking the president of the united states and law enforcement and then just in march this plot quite aspirational but a plot nonetheless to attack a national guard base in illinois. so there's quite a lot of energy in this sort of jihadi system right now. also isis itself you have western and european recruits in syria and iraq and appear to be pivoting toward wanting to launch attacks against the west.