In a Thursday, July 31, 2014 photo, Eric Wood, assistant crew chief with Trails Forever, chisels the edge of a rock before it's used as a walking path on the Chimney Tops Trail in the Great Smoky Mountains National Park near Gatlinburg, Tenn. National Park Service staff and volunteers are reconstructing the popular trail after years of erosion. (AP Photo/Knoxville News Sentinel, Kevin Martin)
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