with me to talk about all of this, david cullen the author of the book "columbine" and colin godda goddardf virginia tech. colin, you still have three bullets in your body. when you hear this virginia killer admire the man who shot you, what goes through your mind? >> it's incredibly disturbing and, frankly, none of us should be thinking about admiring these people or giving really them any notoriety they don't deserve. so my mind on that is pretty short. what i then focus on is how do we stop the next series of shootings that's going to happen in this country because we've done nothing since the last one. that's where i spend most of my focus. >> i want to talk about that, but i want to pause for a moment because this killer in virginia also expressed admiration for the columbine killings, and dave, that's your area of expertise. columbine continues to inspire mass murderers. why is that? >> well, it's sort of the template. it kind of kicked off this whole series of these copycats. it wasn't the first one, but it was the one that brought it to a new level and really kind of showed these p