Government agencies such as NASA and U.S. Customs and Border Protection operate aircraft-size military drones that take off from runways like airplanes. Labs in the United States have even built tiny drones that look like hummingbirds. But most drones resemble the radio-controlled aircraft and toy helicopters flown by hobbyists for decades, capable of taking off horizontally, vertically or by being thrown into the air like a trained falcon or hawk.
via megalextoria.com
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