propaganda. people who are still in the united states that have been radicalized that want to fight isis' war back in the united states, but i think perhaps, the more concerning threat in the medium term is that isis manages to recruit european extremists, perhaps who traveled to syria to get training and then getting them on to planes from europe to the united states with the possibility of making bombs, tatp, suicide vests in the united states and going to gun shops and it's so easy to get extraordinarily powerful weapons in the u.s. so i think that's something that u.s. officials are going to be very concerned about in the weeks ahead and clearly, everybody has to get better on intelligence sharing. they have a chronic problem here in europe. there's no european fbi. there are all these different sovereignties and they have to make some changes now. otherwise we're going to have to