WASHINGTON, March 17 -- The U.S. Department of the Interior's National Park Service issued the following news release: Great Smoky Mountains National Park and the Appalachian-Piedmont-Coastal Zone fire management staff successfully completed a 175-acre prescribed burn along a half-mile of the park boundary in Wears Valley on Tuesday, March 9. The prescribed burn was conducted to reduce the amount of flammable brush along the park's boundary with residential homes, as well as maintaining an open  more