The emergency exit doors of a Boeing Next Generation 737 jet sit open on an assembly line at Boeing's manufacturing facility in Renton, Washington, U.S., on Wednesday, Oct. 27, 2010. Boeing Co. kept production of the 737, the world's most widely flown plane, steady through the recession and plans to increase it by more than 20 percent over the span of a year starting in 2012. Photographer: Kevin P. Casey/Bloomberg via Getty Images
