A severe winter storm that could affect more than 200 million Americans has brought heavy snow and temperatures well below freezing.
Areas that could see more than a foot of snow stretch from Colorado to West Virginia, New York City and Boston, according to the National Weather Service.
More than 10,000 U.S. flights were canceled over the weekend as winter storms hit the country.
Video from Oklahoma shows efforts to clear snow from the state’s roads and airport runways.
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