So you fix that, and something else comes up. Maybe they figure how to hijack the actual flight system from the back.
Yes, you *can* find a way to do a lot of that. But it might not matter. Think about how many antiaircraft missiles there are in "unsavory" hands. Think about 2-3 of those being fired at several major airports during a rush season, at the same time.
Sure, you can prevent that. But you're starting to describe Air Force 1.
Its like the uncrashable airplane. They've got 'em, but they don't fly.
I don't believe we can truly block this from happening.
Its really not a convience thing. That doesn't help - but its always going to be *possible* to do something horrific.
The best you can do is try to cut the chances down.
Addison