Iberia airlines jets at are shown at Madrid's Barajas International Airport. Barajas broke into the top 10 busiest airports in 2007 with 52 million passenger arrivals and departures -- a 13.9 increase over 2006. U.S. airports in the second 10 include Denver (11); New York's JFK (13); Las Vegas (15); Houston (16); Phoenix (17) and Orlando (20).
(Photo: AP Photo)
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