Last night, David Letterman hosted the Killers, who brought "Runaways," their synthed-up Springsteenian juggernaut of a new single, to life in all its absurd, larger-than-life glory. Brandon Flowers brought a new look, one that involved prominent usage of leather jacket and extra waxiness of the face. Drummer Ronnie Vannucci, Jr. deserves extra props for bringing a gigantic and wholly unnecessary ...