BOSTON — The Coast Guard is searching for a possible missing kitesurfer after a kiteboard and sail came ashore on Red River Beach, in Harwich, Mass., Friday. Watchstanders at Coast Guard Sector Southeastern New England in Woods Hole, Mass., received a call at approximately 3:45 p.m. Friday, from the Harwich Police Department reporting that a blue kiteboard with the wording “Techno 283”...