Hi Ignition, those are very valid points. No flight deck door is ever gonna prevent one of these guys from entering if he really wanted to. As to your question on whether we'd leave the cockpit, I don't think anyone of us here would be able to fully comprehend what'd be going through the minds of our poor fellow pilots in that situation or the emotional response. I don't even think the psychologists agree fully on how humans behave under such extreme threat. I know I don't. But I know this: my instinct is to never put my airplane under threat. But it's at times like these that we are reminded that we are not always in control, as much as we like to think we are. We just gotta do the best we can and give it our damnest. I pray that I'll never face one of these things and my heart really goes out first of all to all these crew. And to passengers & innocent people going about their lives.