An Eva Airways Corp. aircraft sits on the tarmac at Tan Son Nhat International Airport in Ho Chi Minh City, Vietnam, on Wednesday, Jan. 11, 2017. Vietnam will continue to see a double-digit gain in passenger numbers in the next decade, after annual growth of 17 percent in the past decade, according to ACB Securities JSC in Dec. 2016. Photographer: Linh Luong Thai/Bloomberg via Getty Images