U2 started their five-night Letterman residency last night (3/2) with No Line On The Horizon's "Breathe." Maybe they've finally accepted "Get On Your Boots" is the worst. They performed "Breathe" along with "Boots" when doing Jonathan Ross, so it's more likely they're just delaying the inevitable. When evaluating No Line we mentioned "Breathe"'s an old-school U2 rocker that, all things ...