Tonyryan
I agree with you, that is why there must be no door or access whatsoever to the pax cabin from the cockpit. The onyl access will have to be from OUTSIDE the aircraft on the ground only.
That way, it doesn't matter how many flight attendants they kill, the hijackers can't get into the cockpit and turn the whole aircraft into a weapon. They may still get the crew to fly them somewhere, or they could blow up the aircraft in flight, but they would never again be able to use the aircraft itself as a weapon.
Hijacks would be much harder to carry off. How exactly would a hijacker no they were in london, till they opened the door etc...
Control would always remain with the pilots who could then go back to using their best judgment, without a gun directly in their face...
Wino