The Federal Aviation Administration is responsible for the safety of civil aviation. The organization develops and operates a system of air traffic control and navigation for civil and military aircraft. It researches civil aeronautics and controls aircraft noise. The organization operates a network of airport towers, air route traffic control centers and flight service stations. The Federal Aviation Administration also builds and installs visual and electronic aids. The organization regulates and encourages the U.S. commercial space transportation industry. It licenses commercial space launch facilities and the private launches of space payloads. In addition, the organization certifies foreign repair shops. It manages the Mike Monroney Aeronautical Center and the William J. Hughes Technical Center. The Federal Aviation Administration additionally registers aircraft and record documents.