Theres a lot that needs to be done. On a British Airways flight from Singapore to London not more that a couple of years ago, I (after asking a junior FA) was allowed to sit in the jump seat for take off, a couple of hours in flight, and for the landing. I noticed the flight deck door held loosely shut with a womens stocking wrapped around it. Beyond the jokes the flight crew shared with me, they explained that they did that so not to wake resting crew in the bunks when the door closed. On landing, the door flew open. I know that it is a bit more secure in the US, but even still, how in hell is a wafer thin door going to stop someone so determined to bring the aircraft down that he/she would take their life! I could be a psycho with a razor blade in my pocket. There was no consideration of this in the 15+ flights ive been able to get into the flight deck just by asking. The doors need to be replaced! I have no problem with some form of alternative security. Perhaps even recruit some flight attendants that have worked as security guards in the past. I personally think that there should be a locked flight deck door on all airlines. Look at BA last year, when some nut case tried to nose dive the aircraft. It happens every day. Lock the doors. Design a little hatch that flight attendants can pass meals and other items through, so that the door can stay shut for the whole flight unless absolutely necessary. Thats what I think anyway.