Lets face it, if I wanted to take the aircraft and 'do a lubitz' then all I have to do is to put the aircraft in an unusual position, roll it inverted etc. nobody but nobody will get through that door under the loads imposed on the aircraft.....whether the door is guarded or not. We have to face facts, the aircraft can always be taken by one of its pilots. This two in the cockpit thing is a complete waste of time. Have always wondered why pilots are parted from their sharp items through security, dont need them to cause a catastrophe.