1971 the airport began operations with charter flights, with airline Air Anglia creating a base at the airfield, offering flights all over northwestern Europe. Their route to Amsterdam is still operated today with KLM Cityhopper. Most of the World War II buildings used by the USAAF remain, although converted for a variety of purposes. Two of the five large pre-war hangars are still being used for aircraft maintenance. One of the other three has been converted into an aviation academy, the remaining two have been converted for commercial use by Air Livery and KLM UK Engineering. The original control tower still exists although the top has been restored and a new tower has been built adjacent to the present main runway. Other wartime buildings now form part of the airport industrial estate (owned by the county and city councils) and are intermingled with many newer structures. Adjacent to the airport terminal building opened by the Queen Mother, there is a memorial display relating to the USAAF, consisting of photographs, paintings, and a plaque commemorating the American use of the airfield. The airport also features the private City of Norwich Aviation Museum to the north of the site by the control tower, commemorating the airfield's history as a military airfield and development as a civil airport through the years, with many civil and military aircraft on display - many of which served from the aerodrome at some point in their lifetime. The former RAF accommodation blocks situated towards Old Catton were until 1993 used by the University of East Anglia as accommodation for students; known to students as "Fifers Lane" halls, these have since been demolished and the site redeveloped as housing. The remaining MoD property—airmen's married quarters—continued to be used for nearby RAF stations, but due to the closure of these stations, the housing has been sold to private buyers. Whilst most runways and taxiways from the military airfield remain, only one runway is primarily used, to avoid takeoffs and landings over built-up areas: Runway 09/27, which was extended eastwards by the RAF in 1956 to 1,841 metres long. The old 04/22 runway is no longer used for takeoffs or landings, but is used for parking and taxiing of aircraft. In 1999, the new corporate identity was launched as Norwich International Airport, kept until April 2017. In March 2004, the city and county councils sold 80.1% of Norwich Airport Ltd.