[donaltroddyn]

Well, the impetus for enhanced airport security was first the spate of hijackings in the late '60s to early '80s, and later 9/11.

While you can hijack a train, you can't fly it to a friendly country, and you can't fly it into a building, so it's a very different threat model.

[hanoz]

Locking cockpit doors has already solved both those problems.

[Uberphallus]

Germanwings would like to have a word with you.

[JamesBarney]

Are you referring to this?

https://en.m.wikipedia.org/wiki/Germanwings_Flight_9525

[Uberphallus]

Yeah, the first officer locked himself in then started descent into a mountain.

[vonzeppelin]

But how does a suicidal pilot apply to airport security?

[ant6n]

..more like a homicidal pilot.