Canadian Museum of Flight in Langley, this Northrup Shelduck target drone dates back to the late 1940s. It was developed in the US. Driven by a jet engine, this unmanned drone could stay aloft for an hour or two, long enough to be used for gunnery practice from fighter aircraft as well as for aiming ground-launched missiles. Many nations used the technology.
Who'd have imagined then that toy drones would one day proliferate and become a nuisance, even a threat, to normal aviation?