you just heard nizzam ali. intelligent authorities say she may have been the one who radicalized him. what do you believe her role was in the attack? >> i think there's a couple ways to look at her role. the first is the radicalization role. my sense, and this is very unusual, i never remember seeing this at the bureau, that she was at least an equal partner. in the first years of 9/11, i don't remember a single female ever cropping up in any threat report and we talked every night, maybe a thousand threat briefings. there's a radicalization piece among equals, which is unusual. the second piece, erin, is even more important. emotional bond. two individuals are making a choice to murder innocence as a result poe tntentially of a political or religious belief. people together bounce off each other and persuade each other that this radical act is acceptable. one of the most troubling cases i ever witnessed, for example, was a father in north carolina in a case already prosecuted, on the wires, interception, we ha