much najibullah, najibullah's attorney, his associate, myself and another interviewing agent.oor there were hundreds of people running leads, doing whatever they could in the background while i sat and talked to him. >> what i think we can do today is we just have an open discussion. maybe we can clear the air a little bit. >> he started to tell us, this is a misunderstanding. i don't know why all the suspicion is on me. i haven't done anything wrong. so i indicate to him that we found your computer. and on that computer we found what looks like bombmaking notes. do you know anything about this? i can see him back pedaling a little bit. how am i going to explain that away? >> i did that by a mistake at one point. i downloaded one of the books. it was a long time ago. as soon as i see it, i say this is not something that i need to see. it has to be my computer right away and deleted it. >> he said i found them online and they're in a book. we came back and we said that's your handwriting. then the story changes again. well, i actually took notes. but then i realized what i was

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. >> najibullah is striving to the bridge. like he's going to come into manhattan via the george washington bridge. >> and we're on the day before 9/11. and so what we're really thinking about is we cannot lose this guy. >> zazi was the picture of an imminent threat. >> travel records had indicated that he had been to pakistan in 2008, potentially that he'd attended terrorist training camps with adis and his two new york counterparts, but we just didn't know what they were up to. >> so this episode, very intriguing provides new details about how the plot was foiled? >> absolutely. for the first time we had the national security agency describing its role in this particular event. so you had local law enforcement from colorado, the new york police department and every level from fbi to the national security agency to other agencies providing information on something that was an ongoing operation, wolf, meaning this thing was going to happen. these folks were driving into the city to blow up themselves on subway cars, and it was