Re: How many drones does it take ...?
The big question is, what happens when a 500g drone hits a 100 ton airliner. Answer: nothing at all.
Maybe a 10kg monster drone could do some damage, possibly knock out an engine, but still not sink the plane. A 100kg military "drone" filled with explosives, sure.
But SECURITY! TERRORIST! RULES! REGULATIONS!
It is mind boggling that they would shut an airport on such vague information. Are we really that risk adverse? Planes do fall out of the sky for lots of reasons, maybe we should shut the airport permanently?