The search for a missing Minnesota family has come to a tragic end.  The wreckage of the single-engine plane piloted by Luke Bucklin of Minneapolis has been found in the mountains of Wyoming.  The plane fell off radar a week ago yesterday after take-off from Jackson Hole.  The Fremont County Sheriff's Department says the plane was found late Monday on the side of a mountain in a boulder field.  It was partly covered with snow.  The crash site is a mile east of the plane's last known location at an elevation of about eleven-thousand feet.  Bucklin and three of his sons were on board.  There were no survivors.