You approach the kiosk, showing the guards on duty your visitors badge and your clearance. They motion you toward the metal detector and conveyor belt, and as you remove all metal objects and place them on a tray, you wonder just what you are getting into...
You step through the metal detector, then reclaim the tray's contents. Your next stop is another kiosk. As you step inside, the door hisses shut behind you, and you place your eyes on the eyepieces in fromt of you, at the same time you speak your name and place your palm on a scanner.
The scanners hum...then the door hisses open...
You have been cleared for access...