There are numerous systems built to take down wayward or dangerous drones, but they tend to have one big catch: you need to be relatively close to the drone, which could be scary if the robotic aircraft is packing explosives. DroneShield thinks it can help. It's introducing the DroneGun, a jammer that disables drone signals (including GPS and GLONASS positioning) from as far as 1.2 miles away. Like most rivals, it doesn't destroy the target drone -- it just forces the vehicle to land or return to its starting point. Anti-drone teams can not only disable threats from a safe distance, but potentially locate their pilots.