21,000 flights delayed. 10,143 flights canceled. more than 1300. that backlogs the airlines. we know that they only have so much equipment, only 500, 600 planes each so when you're talking about 20,000 flights and 11,000, or 12,000 are affected, it's going to take a while before this thing gets back on track. >> that's correct. it's a cascading effect. as you know if you getting in in a plane on los angeles, he might have come from dallas-fort worth or newark, new jersey. he might've been the third stop. yet they have to get this repositioned and picked this schedule back up. it doesn't happen...