Apparently old Star Wars movies are a great source of ideas for the latest drones. This one's called the AirMule, a robotic ambulance and cargo hauler built by Israeli company Urban Aeronautics. The 730hp craft just completed its first phase of flight testing, autonomously hovering 2 feet off the ground, steered by a four-channel flight control system that automatically keeps it stable.

There's a catch, though. In its initial tests, safety wires held this crazy hovercraft in place. If it can pass its next tests without wires, the U.S. military might soon have itself a tiny medivac helicopter that can squeeze into tight urban environments, unlike any other helicopters or fixed-wing aircraft.

Urban Aeronautics, via Danger Room