Allan McArtor, chairman of Airbus Americas, attends the groundbreaking ceremony for the Airbus Assembly Line Mobile facility in Mobile, Alabama, U.S., on Monday, April 8, 2013. Airbus SAS will probably seek some flexibility from its largest customers on delivery of the A320neo single-aisle jet to help accommodate new buyers, as the company tries to work through a record order book for the plane. Photographer: Derick E. Hingle/Bloomberg via Getty Images