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Passengers arriving at O'Hare International Airport search for their luggage in Chicago, Ill., during the holiday travel rush.
Scott Olson/Getty Images
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Travelers wait on line at Los Angeles International Airport's United Airlines counter during the holiday rush.
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Travelers line up for ticketing at O'Hare airport in Chicago during the holiday travel rush.
Nam Y. Huh/AP
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Holiday passengers wait in long lines at Los Angeles International Airport.
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A flight information screen displays canceled flights as a passenger talks on her phone at Midway airport in Chicago during the holiday travel rush.
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Travelers walk in front of an United Airline flight information screen during the holiday travel rush at O'Hare airport in Chicago.
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Travelers wait for their trains at central London's Paddington train station during the holiday rush.
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Christian Lopez gets some rest on a cot in a hallway as he waits to catch a flight home to San Antonio at O'Hare International Airport in Chicago, Ill., during the holiday travel rush.
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Motorists navigate holiday traffic during a winter storm in Lawrence, Kan.
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A passenger information board at central London's Paddington station shows canceled train services to London's Heathrow airport during the holiday travel season.
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