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World's busiest airports

Published On: Oct 17 2013 12:29:02 PM CDT   Updated On: Apr 01 2014 01:00:00 AM CDT

Where is the world's busiest airport? The answer may surprise you.

London's Heathrow Airport
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Jim Spellman/CNN

3. London Heathrow Airport (72,368,061 passengers)

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