Well, the entirely seperate bathroom for the cockpit would certainly take up some precious room, and on some longhaul flights there are two seperate flight crews who trade places halfway through, which would mean there would have to be a seperate seating area for the seccond crew. All of which would do no good against a bomb on board.

The truth is that after 9/11, no group of passengers is going to sit in their seats and wait to be flown into a building, they're going to resist. Before 9/11, it had always been safest to not fight back, but the rules have changed, and very few people will opt for certain death over possible death.

Matthew