Passengers stand at a ticket counter for VietJet Air, operated by VietJet Aviation Joint Stock Co., at Tan Son Nhat International Airport in Ho Chi Minh City, Vietnam, on Sunday, June 1, 2014. VietJet, Vietnam's only privately owned airline, may seek to raise $400 million to $500 million in an initial public offering next year as it takes delivery of as many as 100 additional planes. Photographer: Brent Lewin/Bloomberg via Getty Images
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