(15 Sep 1997) Natural Sound A wildfire that may have been touched off by a bullet continued to threaten a mountain resort area outside Los Angeles on Sunday. Officials said the flames had already destroyed 13 homes, blackened more than 12- hundred acres and continued to burn out of control near the town of Running Springs. The blaze broke out at a shooting range on Saturday, although it is not immediately clear if the heat of a bullet entering brush, or a bullet striking a rock, sparked the