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Forest Service Helps Defend 9/11 Witness Trees From Insect Threat

Flight 93 National Memorial
By Melanie Brezniak Eastern Region, USDA Forest Service Twenty years have passed since the 9/11 attacks, yet there’s a feeling of permanence in a hemlock grove that stands where so many lives were lost that day in southwestern Pennsylvania. Here, the Flight 93 National Memorial draws visitors to the grove’s ...
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