They are called unmanned aerial vehicles but are better known as drones. These are small aerial vehicles with fixed wings or small rotors, are usually powered with batteries, and equipped with a high resolution camera.
Drones range in cost from $99 to tens of thousands of dollars. But they are truly a disruptive technology in that they can do what piloted airplanes can but in cheaper, better, and – in many cases – more efficient ways.
In fewer than five years we will see unmanned aeria