period of fear and attacks by the d.c. sniper. that was three weeks in october of 2002. this is a stunning development that this gentleman has been hopefully eradicated. >> and that fear because of the random nature of it as it moved from one neighborhood to another to fedex, to a trip wire, that has to really bring a town to its knees in terms of where do i go, what do i do that's safe. let's talk about the trail from the fedex video. where did it go? how did it involve coordination of austin police, atf, fbi? >> first of all, there are no perfect crimes, and the frequency and rapidity of these attacks, he was fwounds mabound mistake. and interagency cooperation in the 21st century is so important. local police, they're the first responders, the ones on the ground with the best knowledge of the area and obviously the people that live there. then you add in the atf, the bomb specialists and the fbi. and the dogged investigative efforts that had to go. to do this, this was old-fashioned gumshoe work