Air Greenland year. However, this service ceased in 2015. In July 2015, Air Greenland became a member of the European Regions Airline Association. Air Greenland's domestic airport network includes all 13 civilian airports within Greenland. Outside Greenland, the airline currently operates transatlantic flights to Keflavík International Airport in Iceland and Copenhagen Airport in Denmark. Two international airports capable of serving large airliners – Kangerlussuaq Airport and Narsarsuaq Airport – were constructed as U.S. Air Force military bases during the Second World War and continue to be used for transatlantic flights. All other regional airports are STOL-capable and are served with Dash 7
Greenland a tight fiscal policy since the late 1980s, which has helped create surpluses in the public budget and low inflation. Since 1990, Greenland has registered a foreign-trade deficit following the closure of the last remaining lead and zinc mine that year. More recently, new sources of ruby in Greenland have been discovered, promising to bring new industry and a new export from the country. (See Gemstone industry in Greenland). Air transportation exists both within Greenland and between the island and other nations. There is also scheduled boat traffic, but the long distances lead to long travel times and low frequency.