Boeing unveiled it has delivered the 300th Next Generation 737/800 aircraft to Ryanair, the Irish low-cost airline that, according to the American manufacturer, should receive 37 units of this model in 2011. The planes of this type bought by the airline since 1999, when it was provided with the first 737/800 equipped with 189 seats, would be so many that the low-cost carrier would be the "World's...