International Civil Aviation Organization (ICAO) is a specialized agency related to the United Nations that promotes the safe and orderly growth of civil aviation. It sets international standards in such fields as air navigational facilities, air operations, airports, airworthiness of aircraft, and communications. The ICAO is also concerned with the efficiency and economics of air transport, and it encourages flight safety. In addition, it works to establish international laws that deal with such crimes as airplane hijacking and sabotage. The ICAO also helps developing countries construct and upgrade airports.