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Boeing has revealed that it has retrofitted retired fighter jets to turn them into drones.
It said that one of the Lockheed Martin F-16 made a first flight with an empty cockpit last week.
Two US Air Force pilots controlled the plane from the ground as it flew from a Florida base to the Gulf of Mexico.
Boeing suggested that the innovation could ultimately be used to help train pilots, providing an adversary they could practise firing on.
The jet - which had previously sat mothballed at an Arizona site for 15 years - flew at an altitude of 40,000ft (12.2km) and a speed of Mach 1.47 (1,119mph/1,800km/h).
It carried out a series of manoeuvres including a barrel roll and a "split S" - a move in which the aircraft turns upside down before making a half loop so that it flies the right-way-up in the opposite direction. This can be used in combat to evade missile lock-ons.
Boeing said the unmanned F16 was followed by two chase planes
