Re: I wonder if...
we need to at least consider the possibility of a planned attack on infrastructure; a takedown of the airport.
Before you start pointing to terrorist point to all the disgrunted locals which have been fightiing against the airport for decades and are not particularly happy about the plans regarding the second runway: https://www.theguardian.com/uk-news/2018/oct/18/gatwick-plans-using-emergency-runway-to-increase-flight-capacity
I am surprised this has not happened at Heathrow yet. Probably just a matter of time until it does.
So some "technical means" to intercept and take the f***er down are very much overdue. Fight fire with fire and drones with drones. Ones with a shotgun instead of a GoPro on the mount.