A "once-in-a-generation" winter storm is causing thousands of flight cancellations

Millions of Americans are facing travel disruptions in the days leading up to Christmas because of winter storm Elliott.
Over 2,400 flights within, into, or out of the US were cancelled yesterday (Dec. 22), according to tracker FlightAware. Denver International and Chicago O’Hare International canceled a quarter of the flights originating from the airports, the worst record in the country.