Q: So what kind of attack will this prevent, that otherwise might be successful?
A: There are two kinds of hijackers. There’s the lone nutcase, like someone who will bring a gun onto a plane because, dammit, they’re going to take the whole plane down with them. Any pre-9-11 airport security would catch a person like that.
The second kind is the well-planned, well-financed Al Qaeda-like plot. And nothing can be done to stop someone like that.
That last bit is sobering and 100% correct.