![](http://www.alamy.com/thumbs/6/884867FD-94E1-4EEB-8CE1-B29E0E55C3A2/HAA1XX.jpg)
usinterior 4090023080 Secretary Salazar, Governor Rendell, Senator Casey and Others Break Ground on Flight 93 National Memorial
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Photo credit: © Nature and Science / Alamy / Afripics
License: Licensed
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Keywords: national, nature, nps, park, politics, science, usa