
Formation flying is the disciplined flight of two or more aircraft under the command of a flight leader. Military pilots use formations for mutual defense and concentration of firepower. In civil aviation, formation flying is performed at air shows and is also flown for recreation. Formation flying also has been discussed as a means to reduce fuel...
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http://en.wikipedia.org/wiki/Formation_flying

two or more aircraft traveling and maneuvering together in a disciplined, synchronized, predetermined manner. In a tight formation, such as is ... [2 related articles]
Found on
http://www.britannica.com/eb/a-z/f/47
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