Aerospace industry officials expect the U.S. and European fighter aircraft markets to remain largely independent of each other despite the popularity of the multinational Joint Strike Fighter program. European governments continue to value self-sufficiency and take a measure of pride in their indigenous aircraft programs, which gives European fighters a substantial advantage over U.S. competitors in European competitions, according to industry officials. At the same time, the U.S. fighter market continues to be monopolized by domestic giants Boeing and Lockheed...