And that's what reinforced cockpit doors are for; if you can't gain access to the pilots then you can't hijack the plane. If you can't hijack the plane, then yo

And that's what reinforced cockpit doors are for; if you can't gain access to the pilots then you can't hijack the plane. If you can't hijack the plane, then you can't turn it into a missile. Everything else is just a waste if you're just concerned with preventing the plane from becoming a missile.