A Moorhead man, 18, was injured Sunday when the semitrailer he was driving in rural Clay County tipped over in a gravel-road ditch, trapping him inside, authorities said. The name of the driver, who was taken by helicopter to MeritCare to treat leg injuries, was not available Sunday, said Sgt. Brian Norberg of the Clay County Sheriff's Department. Advertisement: GRAND FORKS SUBARU / KIA ...