Death from a swarm of tiny drones: U.S. Air Force releases terrifying video of tiny flybots that can can hover, stalk and even kill targets

The U.S. Air Force is developing tiny unmanned drones that will fly in swarms, hover like bees, crawl like spiders and even sneak up on unsuspecting targets and execute them with lethal precision.

The Air Vehicles Directorate, a research arm of the Air Force, has released a computer-animated video outlining the the future capabilities of Micro Air Vehicles (MAVs). The project promises to revolutionize war by down-sizing the combatants.

'MAVs will become a vital element in the ever-changing war-fighting environment and will help ensure success on the battlefield of the future,' the narrator intones.

'Unobtrusive, pervasive, lethal - Micro Air Vehicles, enhancing the capabilities of the future war fighter.'