+D21 was a high-speed, uncrewed [Reconnaissance](/wiki/Reconnaissance) aircraft, designed for stealthy, long-range missions. Launched from a mothership, this advanced [Drone](/wiki/Drone) carried cameras deep into hostile airspace, a silent eye in the sky.
+## See also
+- [Spy Plane](/wiki/Spy_Plane)
+- [Jet Engine](/wiki/Jet_Engine)
+- [Aerospace](/wiki/Aerospace)
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