It has a sleek black pill of a body, with two rigid, white arms sprouting from its sides. It looks, in other words, like an iPad had a baby with a crop duster, or like a Volkswagen Bug from a future designed by Bjork. In the video, it sits on a small, square tarmac, surrounded by grass, then begins to purr and buzz. In a nearby hangar, a group of attractive young Germans stands and watches intently.
And then, slowly, the vibrating thing rises f ..