Hostile aircraft refers to aircraft that are perceived as a threat or danger to a particular area or country. These aircraft may intrude into a particular line of airspace and refuse to respond when challenged, or they may be sent by a terror group to carry out attacks. Hostile aircraft can be located by a variety of methods, and in some cases, the military may launch a manhunt or air attack against them. The term "hostile aircraft" is often used in news reports and military contexts to describe aircraft that pose a potential threat to a particular area or country.