Drones, also known as unmanned aerial vehicles (UAVs), unmanned aircraft systems (UAS), and remotely piloted aerial systems (RPAS), are remotely piloted aircrafts. They are used by the military for surveillance and can be armed for air strikes in dangerous or risky situations. Drones have also been used for nonmilitary purposes, including real estate photography, cartography, and competitive racing. In 2016, the Federal Aviation Administration (FAA) finalized rules for the personal recreational use and commercial use of small drones. The rules did not address drone deliveries of goods, however, which use autonomous technology rather than human pilots. Drone use is controversial and raises questions surrounding civil liberties and ethical and privacy concerns. (Opposing Viewpoints)