Millions Of Americans Travel Ahead Of Thanksgiving Holiday

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Passengers walk with their luggage at Union Station November 21, 2012... News PhotoBusiness,Finance,Horizontal,Human Interest,Luggage,Passenger,Transportation,USA,Union Station - Washington DC,Waist Up,Walking,Washington DCPhotographer Collection: Getty Images News 2012 Getty ImagesWASHINGTON, DC - NOVEMBER 21: Passengers walk with their luggage at Union Station November 21, 2012 in Washington, DC. Travelers are expected to flood the nation’s transportation system for the Thanksgiving holidays. (Photo by Alex Wong/Getty Images)