now. a common thread, dan, that we ve seen over the last decade is attacks or attempt at attacks being carried out by individuals who have recently moved to this country taking out their frustrations on their adoptive countries. for example, the attempted times square bomber. what kind of challenge did these type of terrorists present to counterterrorism officials as opposed to more traditional al qaeda type terrorists? well, not just in this country, you ll recall that in france just a couple of years ago a man named mohammed ma raw killed a lot of people in and around ta lose, also a case in holland in 2004 where he killed a famous artist. these are very, very difficult cases because if they re not maintaining connections with terrorist groups in other countries, then there are not a lot of leads to go on. sometimes these people will say things that will get reported by members of their community or others, or they ll do postings