Gents,
The rules have all changed..gone are the days when you would negotiate patiently with hijackers, safe in the knowledge that you were indispensible. Armed guards on board the aircraft may be unpalatable, but something has to be done to safeguard not only the passengers and crew, but people going about their everyday lives on the ground. We had a warning months ago when a man burst into the cockpit of the BA 744 and tried to take control. The cockpit door Should be locked, and capable of withstanding enough damage to allow the pilots a decent chance of getting the aircraft on the ground somewhere safe.
My thoughts go out to all those who have suffered, and those who are yet to suffer as a result of those murderers.