Re: Secure doors.
children were schooled in a building for several years (mine included) which had a section that was meant to be locked and secured at all times as it had computers/data on many people. Said son grew up to become IT admin at same facility and one day told the big boss to come over to the secure section. He then pulled out a credit card, slid it into the latch area on the main door and it opened. Big boss turned a bit sickly looking, and then got even more sickly looking when he was told that the kids used to get in during unsupervised times to game on the office computers, seems the door knob had been installed backward and the bolt easily slid open with said credit card or other thin stiff object.