Airlines globally will need more than 41,000 aircraft over the next 20 years, according to Boeing's latest outlook. Edward Russell sat down with Boeing's Vice President of Commercial Marketing Darren Hulst at the Farnborough Air Show to discuss the outlook. Also, what is Boeing's response in the so-called middle-of-the-market that Airbus has run away with with its A321neo? Get more essential airline news at Airline Weekly.