this door is a slim door. we have the peep hole to see outside. there is more security. i want to take you outside and introduce you to captain ross. if you take a look at the door it is really thick. i can feel it is heavy. what does it take to break down the door? >> probably more than a grenade. it has been tested with a grenade. >> reporter: it is really a fortified door. >> it is a fortress door. >> reporter: beyond that other ways a pilot can make sure no one can get in here. tell me about the lock. >> this is a deadbolt as you can see. if that deadbolt is engaged, again, this door is completely locked. >> reporter: no matter what. >> no matter what. >> reporter: how do you get in there? >> you can't. this of course there is a key back here if you like to show