In a dim, low ceiling room, federal agents and private contractors are testing the feed coming off cameras erected along the southeastern Arizona border. It’s a subdued project when you consider the magnitude of the goal: eyes and ears watching every movement along the U.S.-Mexico border 24 hours, seven days a week. The Customs and Border Protection agency uses two types of towers: integrated fixed towers (IFT), which use ground sensor surveillance in rural parts of the Mexican border, and remote video surveillance systems, which are used in urban areas where legal traffic is heavy enough to render ground sensors useless. The agency currently uses eight of the IFTs in southeastern Arizona and 11 of the remote video systems. It’s called the Arizona Border Surveillance Technology Plan; and it’s a network of these towers, cameras mounted on pickup trucks and backpack surveillance systems that can be hiked into the desert and dug into the ground.