Winter storm Elliott brought ice, sub-zero temperatures and high winds to much of the U.S. leading to a cascade of cancellations and delays over the busiest travel weekend of the year. On Monday alone there were over 4,000 flight cancellations in the U.S. and over 9,000 delays.

Reset learns how this happens, what you need to know as a passenger, and what advocates are pushing for to make travel smoother. We talk to David Schaper, NPR transportation correspondent, and Andrew Appelbaum, staff attorney for Flyers Rights.