If you haven't seen any tiny remote-controlled quadcopters circling in the air, you might need to get out a bit more. Maybe we shouldn't get too paranoid about these things, thinking they're black helicopters
for the 21st century, but if you hear constant artificial buzzing noises, perhaps you should start gearing up to defend your home. Drones could be delivering your pizza for dinner someday, but there are all kinds of uses for this technology.
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