Think about it. You were a teenager once, and so you know that teenagers -- OK, maybe not you, but people you went to school with -- do some really, really dumb things. Give a bored 16-year-old a snowball and some passing cars, and he'll be chased into the woods by a cop. Give him a handful of rocks, and he's going down to the stationhouse. But in Duncan, Okla.., that kid had a .22 caliber revolver. We don't know yet how that happened -- but we know that a good man is dead and three young lives can't be redeemed because of a split-second, irrevocable decision to pull the trigger on a gun.