Two key U.S. unmanned aircraft systems are embroiled in a heated debate over how the Pentagon can rapidly field surveillance and reconnaissance capabilities while sticking to traditional acquisition processes demanding rigorous testing. Northrop Grumman and the U.S. Air Force are trading accusations over whether poor design and workmanship or flight-test conservatism and constraints are behind expected delays to the Global Hawk high-altitude UAS. At the same time, the Defense Dept. is ...


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