thought that by allowing this to happen, they would actually protect their own country, because these people would not attack the hand that was feeding then. of course, this calculation turned out to be tragically wrong on july 7, 2005, when london was attacked. only then did the british authorities start to crack down on islamic radicalism. but of course, a lot of the people that had been radicalized beforehand are still now active, and they are still responsible for much of the terrorism that is happening in europe and in western countries. so this is really the legacy of a very bad policy. jenna: quickly, how many of them are there? >> well, you know, at some point, one of the most radical clerics in london was attracting a couple thousand people to his sermons in london, so there may be a lot more out there. jenna: very fascinating, peter, always great to have your insight, peter neumann, king's college in london. thank you sir. jon: it is one of the most