This Wednesday August 5, 2013 photo provided by Virginia Tech shows dead hemlocks in Tennessee at the Gatlinburg entrance to the Great Smoky Mountains National Park. Researchers at Virginia Tech and the U.S. Forest Service are hopeful a beetle from Japan will gorge on the hemlock woolly adelgid, which has destroyed vast stands of hemlocks in the Southeast. (AP Photo/Virginia Tech, Scott Salom)
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