BBC NEWS | Science/Nature | 'Eternal planes' to watch over us: "Eternal planes' to watch over us
By Jo Twist
BBC News science and technology reporter
Artist's impression of the Mercator Unmanned Aerial Vehicle (UAV)
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Unmanned surveillance vehicles are increasingly evident in a world that relies on knowing what people and places are doing.
Unmanned Aerial Vehicles (UAVs) patrol innocuous-looking skies and silently report back streams of strategically important data, video, and images from locations around the world."
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