The last decade has seen an increased interest in the development of unmanned systems. Either remotely piloted/controlled or fully autonomous (always with a man-in-the-loop, as full autonomy does not exist yet), they can provide a safer, cheaper alternative to larger manned craft, as well as a valuable "bird's eye" observation platform to the Armed Forces, mid-way between ground-based sensors and high-flying satellites. These considerations have opened the way to unmanned applications in many fields, including homeland security, public services, and the commercial sector.
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