Quadrocopters learn to build things, when will humans learn to fear them? (video)

The GRASP Lab quadrocopters were impressive enough by themselves, all slashing and swooping through the air with unerring precision, but then their makers had to go and give them the intelligence to work in groups and today the inevitable has happened: they've learned how to construct things! Sure, the structures are rudimentary, but we can recognize the beginnings of human containment cells when we see them. Skip past the break for the bone-chilling, teamwork-infused video.