This way, Gremlins would flush out the position of any hostile missile battery that switched on its targeting radar, marking it for subsequent destruction.
That, at least, is the idea. So far, though Gremlins have managed to come within centimetres of successful capture, such capture has not been achieved.
To that end DARPA, the defence department's advanced research projects agency, is running a programme called Gremlins, a name that also applies to the individual drones themselves.
As with Gremlins and Sparrowhawks, the army's push for what it calls " air-launched effects" is driven by America's shift from counterinsurgency to potential war with a foreign power.
But Dynetics hopes some software tweaks will deal with this by the summer, when operational testing of the Gremlins system by the air force is supposed to begin.
A successful capture shuts off the Gremlin's engine. A winch then hoists the drone on board. This arrangement should be able to pull eight Gremlins an hour out of the air.
Bob sees a gremlin on the wing of the plane and decides the only possible solution to the problem is to steal the air marshal's gun, open the emergency exit, and shoot the thing.