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  1. Aircraft - Wikipedia

  2. Airplane | Definition, Types, Mechanics, & Facts | Britannica

  3. Airplane - Wikipedia

  4. NASA Tests Air Traffic Surveillance Technology Using Its Pilatus PC …

  5. Aviation | Definition, History, & Facts | Britannica

  6. History of flight | Airplanes, Dates, & Facts | Britannica

  7. Aircraft - Simple English Wikipedia, the free encyclopedia

  8. How planes work | the science of flight - Explain that Stuff

  9. Beginner's Guide to Aeronautics - NASA

  10. Aircraft Categories, Classes, and Types: Pilotinstitute

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