We've always known there was something going that defied explanation, something that's produced all those race victories and all those championships in an era where the competitive field at NASCAR's highest level is as deep as it's ever been. Not even Richard Petty or Dale Earnhardt were able to manage a run of six titles in eight years. And now we know why, thanks to crew chief Chad Knaus, who gave up the secret in the media center following the season's final race. More...