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"The future of humanity is assured. Assuredly doomed, that is. That blur you see up above is one of our familiar foes, the GRASP Lab's autonomous quadrocopter, flying through a thrown hoop without the assistance of a human director. Yes, it's downright insane that we're allowing this so-called research to continue our descent toward the robot uprising -- where's the FBI, the CIA, hell, why is DARPA sleeping on this thing? The lethal precision of these quadrotor helis doesn't end there, however, as they've now been enhanced with the ability to recover from \"extreme\" starting conditions. In simpler terms that just means you can toss one up into the air and it'll right itself into a steady hovering position. From where it can strike upon the unsuspecting and complacent humanoid populace."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2010/09/16/quadrocopters-can-now-fly-through-thrown-hoops-the-end-really-i/>