developments at reagan national outside of d.c. what is the story behind these cance cancellations? >> reporter: it's a big operational mess for southwest airlines, erica. it's not like flipping on a switch to get it back to normal. this is more like the airline needs to unplug it and plug it back in again because it says these problems all started back on friday when there were weather and air traffic control issues. the federal aviation administration put out a statement saying there were no weather or agency issues on saturday and sunday when southwest experienced the lion's share of cancellations and delays. it canceled 800 flights on saturday, 1,100 nights on sunday, about a third of its overall schedule for the day. it's canceled about 350 flights today, about 1 in every 10 flights. there is a ripple effect southwest says it put planes and people in the wrong spots. some flight crews didn't even have hotels and that left tens of thousands of passengers in