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The document discusses the Dark Knight stealth unmanned combat air vehicle, highlighting its use of low observable technology to reduce detection by enemies. Key elements of its stealth features include a stealthy plan-form, radar absorbent materials, heat signature reduction, and electronic noise reduction. The vehicle is piloted remotely, can be pre-programmed for flight paths, and boasts higher endurance and survivability compared to other UAVs like Global Hawk and Reaper.