Authorities in Pennsylvania say they arrested a "wolf pack" of teenagers in connection with an assault on a 13-year-old boy who police say was kidnapped and hung from a fence post. Nadin Khoury, of Upper Darby, Pa., was walking home from school on Jan. 11 when he was attacked by a group of teenagers who punched, kicked and dragged him through the snow before stuffing him in a tree and hanging him by his coat on a 7-foot-high fence, police said. The boy, who was not seriously injured, was rescued when a passerby jumped out of her car and took...