uzbekistan for example. that would be a great concern to us if there are others who may have derived inspiration from this guy or perhaps he was involved in a wider network. >> sean: as we were saying tonight the "new york post" is reporting that he had pledged allegiance to isis. i don't believe for one second that radical islamists have given up on reproducing or having a huge event like 9/11. but it seems in the interim these lone wolfs are out there. they are pledging allegiance. it's much harder to grasp what's happening or following every single one. what would be the best way to deal with that? because i think people want to know how can we stop these individuals that are sitting in their apartments plotting and planning and scheming the killing of innocent people. >> well, let me just start with one way we didn't stop it, from the perspective of someone who served many years overseas as an intelligence officer. one of the lessons we learned from 9/11 is the danger of allowing terrorists to occupy ungoverned space which they have