Political and programmatic upheaval is shifting the ground under U.S. and European combat aircraft builders as they await the outcome of competitions in Asia, Latin America and Europe. Japan is just one case in point. Boeing, Lockheed Martin and Eurofighter are awaiting the release of a request for proposals to buy a new fighter to replace its F-4EJ Phantom.However, domestic political turmoil that led to a change in government, as well as controversy over the U.S. Marine Corps base on Okinawa, has drawn attention elsewhere. As a result, the fighter contest may not begin until next year or possibly later,...