When neighbors noticed black trucks, satellite dishes, swirling radars, and "a portable launch pad, with something covered up" on a Waller County Ranch, they had no idea what to think. CNN's Houston affiliate KPRC has partially solved the mystery: Houston police plan to start using unmanned drone aircraft. But, a question still remains: what, exactly, will the drones be used for? The mood surrounding Waller County Ranch was highly secretive. At the entrance to the test site stood a Houston police road block, making sure only those invited were let through. HPD lieutenants refused to answer any questions from KPRC reporters, but KPRC still managed to gain footage of the "test [we] were not supposed to see." "[The] drone was able to use a high-powered camera to track us," says Stephen Dean, who tracked the drone for KPRC. "Those cameras can actually look into people's homes or even follow them in moving cars." Drone Planes are not new to the United States. The military has been...