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Aircraft - Wikipedia
Airplane | Definition, Types, Mechanics, & Facts | Britannica
Airplane - Wikipedia
NASA Tests Air Traffic Surveillance Technology Using Its Pilatus PC …
Aviation | Definition, History, & Facts | Britannica
History of flight | Airplanes, Dates, & Facts | Britannica
Aircraft - Simple English Wikipedia, the free encyclopedia
How planes work | the science of flight - Explain that Stuff
Beginner's Guide to Aeronautics - NASA
Aircraft Categories, Classes, and Types: Pilotinstitute
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