Perimeter security is provided by uniformed private security guards, called "camo dudes," working for EG&G's security subcontractor Wackenhut [2] , who patrol in desert camouflage Jeep Cherokee and Hum-Vee vehicles, and more recently, champagne-colored Ford F-150 pickups and gray Chevy 2500 4X4 pickups. Although the guards are armed with M16s , no