DIY drones: don't confuse homemade UAVs with military killing machines

Google's Eric Schmidt has suggested they will be used for surveillance, but those who make them insist they have benefits"It was always a dream to build one, after having built helicopters in my bedroom for a while. I mostly like flying for fun, seeing whether I can get the device to auto-stabilise. As opposed to a plane or helicopter, you don't need a lot of knowledge to control them. They f

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