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What's behind flight delays?

Name: What's behind flight delays?
Uploaded: 2015-08-06T18:47:00-0400
Duration: 1 min 59 s
Description: What should be a 90-minute flight from Chicago's O'Hare Airport to Knoxville, Tennessee often takes much longer. CBS News' Kris Van Cleave looked into what's behind the delays.

What should be a 90-minute flight from Chicago's O'Hare Airport to Knoxville, Tennessee often takes much longer. CBS News' Kris Van Cleave looked into what's behind the delays.