That promotional video in the article is pretty cool. The drone is shown "landing" by catching a taut cable with a hook, midair. Even if there's a human pilot doing that part, that is no small feat.
How do you figure? If you miss the target, you're still flying, come around for another pass.
If you hit the target with something other than your hook, then you crash, but just make the hook long enough that thats not a concern.