<human>:  How does the US Military visual tracking work?
<bot>: That’s a good question. It’s a very complicated system. The military uses a wide variety of different sensors to track targets. The most commonly used sensors are cameras, radar, and infrared sensors. Cameras are used to identify targets, and they are often used in conjunction with radar and infrared sensors. Radar is used to detect objects at a distance, while infrared sensors are used to identify objects that are hidden by fog, smoke, or darkness.