PALMDALE -- Amid signs of growing U.S. Air Force and Navy interest in a sixth-generation combat aircraft, Northrop Grumman is accelerating studies of key technologies for directed energy weapons and thermal management, which it says will be fundamental to future capability. The company, whose last venture into the air dominance arena in the 1980s, the YF-23, lost out to Lockheed Martin’s F-22 in the advanced tactical fighter contest, has unveiled new  images of a pair of ...


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