somebody who blends in well, who is very charismatic, appears very gracious. they don't have the characteristics we all assume we'll see, those that are very out there and indicative of this person's probably not right with them. a true terrorist is intelligent. they absorb well into society. so i don't think that, you know, there is anything particular we should be looking for. in fact, this is probably the typical behavior you would see of a truly intelligent and successful terrorist. >> some in the intelligence community have said, look, this is horrible but now we've learned things and we're attuned to certain sensitivities that before maybe we were not, that the intelligence community learned from this. you see that in the example as well? >> it's difficult. there's so many people out there they're watching. just the database alone where they put in the terrorists' names, there's something like 740,000 names in there of possible terrorists we should be watching. how can you oversee something like that? law enforcement and the