A pilotless plane, also known as a DRONE, is an aircraft that is operated without a human pilot on board. It is usually controlled remotely by a computer or ROBOT, and can be used for a variety of purposes such as surveillance, reconnaissance, and military operations. The term 'DRONE' is often used interchangeably with the term 'unmanned aerial vehicle' (UAV). The Predator DRONE is a type of UAV developed by the United States Air Force for use in reconnaissance and combat missions.