David Ritchie | Taylor University
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Beneath Raven Rock: Secrets inside Central PA's 'Underground Pentagon' | fox43.com
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About Camp David: Raven Rock Mountain Complex
About Camp David: Hickory Lodge at Camp David
About Camp David: Hickory Lodge at Camp David
Elevation of Camp David, Catoctin Mountain Park, Maryland, USA - Topographic Map - Altitude Map
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Camp Ritchie | Hagerstown Magazine
