PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY
Sperwer UAV tests. Engineers pushing a Sperwer UAV (unmanned aerial vehicle) and its cradle along a road at a manufacturing and testing facility. UAVs, sometimes known as drones, can be autonomous or remotely controlled, and are used for a wide range of surveillance purposes. The Sperwer UAV is a military drone that can be flown to heights of 4500 metres, and be controlled over distances of 200 kilometres. It carries a range of sensors, including those mounted in a swivel-ball camera beneath its nose. The Sperwer UAVs were developed in the 1990s by the French-based company Sagem Defense Securite.
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