Hundreds of flights were cancelled and thousands more delayed across the United States on Thursday as a powerful winter storm swept through the centre of the country.
More than 6,500 flights were delayed and some 800 more were cancelled, according to the flight tracking website FlightAware.
A mix of rain, snow and strong winds also made travel dangerous or impossible on roads, especially
in the northern and central plains, where some areas could see more than a foot of snow before the storm subsides Friday.
Dallas-Fort Worth International Airport in Texas - a major hub for American Airlines through which more than 200,000 holiday travellers were expected to pass - experienced the heaviest disruptions.
More than 450 flights were cancelled and more than 600 others were delayed.