Super-Silent Owl Drone Will Spy on You Without You Ever Noticing

Super-Silent Owl Drone Will Spy on You Without You Ever Noticing | Danger Room | Wired.com: "For spy tools, drones are pretty easy to spot. And hear, because they’re as loud as a gut-busting rock concert. But now the intelligence community’s research division, Iarpa, plans to start designing a silent drone inspired by quiet, creeping, flying owls."