PITTSBURGH (AP) - It's a beautiful day to honor Mister Rogers with a postage stamp. The U.S. Postal Service has released a stamp featuring Fred Rogers, the gentle TV host who entertained and educated generations of preschoolers on "Mister Rogers' Neighborhood." The "forever" stamp went on sale Friday. It pictures Rogers in his trademark cardigan along with King Friday, a puppet character from the show's Neighborhood of Make-Believe sketch.