The US Customs and Border Protection recently purchased a Predator B drone to assist in the monitoring. Dubya called for better technology to protect our precious US borders earlier this week. This would include more employees and possibly the addition of drones to monitor the borders. The Predator B is currently being used in the Tucson, AZ area and the CBP has received the go-ahead to purchase another one. The drone is an unmanned and remotely-controlled aircraft, and is being used by the Border Patrol.”]
Source: https://gizmodo.com/border-drones-protecting-theborders-140677