Longtime agency executive Bill Fries, best known for turning an ad campaign for an Iowa bread company into the outlaw trucker anthem, “Convoy,” which reached No. 1 on the charts in 1976 and inspired a movie, died on Friday at his home in Colorado. He was 93. Fries worked as an ad executive at Bozell & Jacobs in Omaha in the 1970s, when he helped to create a series of television commercials for Metz Baking Company about a trucker named C.W. McCall hauling Old Home bread in an eighteen-wheeler.