i was at that shooting, i was the first one i ever covered. we covered it as a phenomenon. we were there for weeks. we couldn't believe that these two kids had arrived at this kind of solution. i spent days in malls following around this mythical group calls the trench coat mafia which turned out to be a group of goth kids because we were so desperate to understand how this could have happened because this would never be something we could expect. 20 years ago. all of the ones since, we're less curious about it now than we were then. what does that mean to you? >> wow. so, it's always fascinating every time another shooting comes up that columbine comes up. i don't know why it's something sort of barometer.