Drones have, in recent times, flooded the French skies, illegally surveilling nuclear plants. With explosive aboard, or just cameras?

So far, no one knows where the things have come from, or where they go when they fly away. Authorities feel foolish. Can’t catch them.

This has Got to be an interesting story. Who would go to the trouble, and just what are they up to? And why can’t modern law enforcement technology follow those drones back to their lairs?