Yes. There was a piece on 60 Minutes a few years back where they had a big (~20 ft. wingspan maybe), loud drone circling overhead a few thousand feet up. It was inaudible and invisible. What's the point in solving a hard problem like hi-res imagery from space when you can just fly one of these over the target practically at will? (With a Hellfire missile attached, no less.) Range and airspace issues notwithstanding, the drone future is a scary place.