Antonio Guzman, a sensor payload operator for the MQ-9 Predator B drone, discusses the avionics inside the nose of the drone at Fort Huachuca , Arizona, December 5, 2006. The drone, with a wing span of 66 feet and maximum altitude of 50,000 ft., is used to detect undocumented immigrants entering illegal into the United States from Mexico. Picture taken December 5, 2006. REUTERS/Jeff Topping (UNITED STATES)