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The General Atomics MQ-9 Reaper (sometimes called Predator B) is an unmanned aerial vehicle (UAV, one component of an unmanned aircraft system (UAS)) capable of remotely controlled or autonomous flight operations, developed by General Atomics Aeronautical Systems (GA-ASI) primarily for the United States Air Force (USAF).
22 April – Merle Greene Robertson, American archaeologist whose drawings were used to crack the Maya script (b. 1913 ). 30 April – Daniel Quillen , American mathematician (b.