>> michael leiter knows a lot about being vigilant. he served as director of the national counterterrorism center and is an nbc terror analyst. michael, this last 24 hours sort of trying to go through the sourcing and you've been in the middle of this kind of operation, so you know exactly what's going on. pete williams and a lot of our sources now reporting that the bomber himself, the reason why he's no longer a threat, is he was never a threat because he was a u.s. asset. he brought the bomb out and is now, of course, outside of washington being examined by fbi analysts. but we had actually infiltrated al qaeda. >> well, this is something we've been trying to do for a long time. the reason that these issues remain so sensitive, of course, is key operatives, key insiders, are people who we want to continue to use. even though we had a success here, that doesn't mean that al