these tickets. >> right. that's right. he came forward, actually, yes. >> i think that makes it much less likely that he was somehow involved in some sort of scheme or plot. >> passports. there's essentially, i guess, a black market for stolen passports. if you get a passport, this is just sort of a basic question, okay, someone sells me a stolen passport, what to people do with a stolen passport? have to cut out the photo, presumably, to get on an airplane? >> used to be much easier before we have what are known as machine readable passports. now when you come through a border, the customs officer slides that through and provides him with data. you have to remove the picture, put your new picture in. once that's done, it's very easy to still get caught because of the machine readable characteristics. in addition, at many border crossings you're going to provide a thumbprint, fingerprint and photo and many cases the false user of the passport can be caught through the biometric measures. >> if you're not working from the kind of crash side by the counterterrorism side, security side, you are trying to find out