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Equipped with the Dismount Detection Radar pod, the Proteus aircraft takes off from the flightline April 22, 2014, at the Mojave Airport Civilian Flight Test Center in California. The flight marked the first developmental test flight of the system. The DDR program office from Hanscom Air Force Base, Mass., led the effort and plans to use the DDR as a model for other open system architecture radar designs. (U.S. Air Force photo/1st Lt. Matthew Cook)