If in your wanderings around John Wayne Airport you get the feeling you're being watched, don't feel paranoid. You are.
The extra eyes are part of a sophisticated system that allows security to keep track not only of passengers and others temporarily in the airport but employees.
Look up on nearly any large wall in the terminal and you'll see video cameras recording the scene below. Multi-lens cameras, similar to those that peer down on the gambling tables in Las Vegas casinos, hang from the ceiling of the baggage claim area. And closed-circuit cameras are positioned in the parking garages and on the airfield itself.
The images they record are seen on monitors in the central control room.
One of the most sophisticated parts of the system keeps track of the comings and goings of airport employees. Each employee is issued an identification card with a magnetic stripe, similar to the one on a bank ATM card, that is electronically encoded uniquely for them. To go through any door that leads to a "sterile" area (any area on the airplane side of the passenger security checkpoints), employees must insert the card into a slot, where it is read electronically and compared to data in a central computer.