I was on duty for every mortar attack at LHR, scared me to death. Airport security is crap. If you want to get around it, you can. Nothing will stop a determined person getting airside and doing some damage. You do not even have to get airside. A friend of mine passes through security at LBA everytime for his shift, the security don't know that in the staff kitchen (airside) there are steel knives (up to 12" long) and forks which can be easily taken onto an aeroplane. I remember one security guard saying to me "it's not you but it could be the person who is holding your family". I did not understand because I would not have to go through security to get a dangerous weapon on board an aeroplane, the weapons are already there (big axe). What about the engineers, do they use blunt, plastic screwdrivers? Do they use sharp knives? Are they terrorists? We do not know, but all I'm saying that there are far more other avenues to look at to ensure security. The passenger side of it is minimal.