Southwest under scrutiny after wave of storm cancellations

The U.S. Department of Transportation says it will look into flight cancellations by Southwest Airlines that have left travelers stranded at airports across the country amid an intense winter storm that has killed dozens of people. Many airlines were forced to cancel flights due to the weather, but Southwest was by far the most affected. Of the 2,890 flight cancellations in the U.S. early Tuesday, 2,522 were called off by Southwest, according to the tracking website FlightAware. A Southwest spokesman says cancellations snowballed as the storm moved from the eastern to the western U.S., leaving flight crews and planes out of place.