Since 2000, reports the Air Transport Association of America, there's been a 21% drop in passenger volume for flights of 500 miles or less.

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May, president of the Air Transport Association of America.

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"It's a matter of getting the contracting states around the table and acknowledging this is a serious issue: that the number of unruly passengers is on the rise and it needs to be decided how countries address this, " Steve Lott, former International Air Transport Association head of corporate communications in North America, told Orient Aviation magazine in 2010.

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