Easyjet Crew Emma Murry and Claudia Jackson sit in one of the engines of a new Airbus A319 at Belfast International Airport, Wednesday, December 9th, 2009. Easyjet is replacing the five Boeing 737s with Belfast International Airport with five brand new Airbus 319s. More than 6,400 A320 aircraft have been sold to more than 300 customers and operators worldwide, making it the world's best selling commercial jetliner. Photo/Paul McErlane