He's the youngest champ in race history
                                
                                
                                    (Newser) -
                                    Leading on the final lap of the Daytona 500, a pack of veterans baring down on his bumper, Trevor Bayne didn't panic. He figured it would be a cool story to tell someday, how he led a lap in NASCAR's biggest show. Somebody, maybe Tony Stewart, would pass him any...