Making airplanes is one of the most prestigious things countries can do, a testimony to their technical skills, engineering prowess and aspirations on the world stage. It can be a source of national pride, but also a flashpoint. Nothing illustrates this more than the global rivalry of Boeing Co. and Airbus SE, the Coke and Pepsi of the skies. An almost 16-year-old trade dispute is coming to a head as the U.S. and European Union prepare to launch a barrage of tariffs, subject to a further World T