Question: triipoli international airport was the hub for libyan airlines or formerly known as?
Context: Ghadames Airport (IATA: LTD, ICAO: HLTD) is located 12.1 mi east of Ghadames, Libya.  Currently Libyan Airlines uses the airport for scheduled service to Tripoli.  The Libyan Air Force apparently also uses the site, although this is hard to confirm visually. Hazrat Shahjalal International Airport (Bengali: হযরত শাহ্‌জালাল আন্তর্জাতিক বিমানবন্দর "Hôzrôt Shahjalal Antôrjatik Bimanbôndôr") (IATA: DAC, ICAO: VGHS (old: VGZR)) , formerly Zia International Airport, is the largest airport in Bangladesh.  Operated and maintained by the Civil Aviation Authority, Bangladesh, it is also used by the Bangladesh Air Force as a part of "BAF Bangabandhu Base".  Located in Kurmitola in northern Dhaka, it started operations in 1980, taking over as the country's capital international airport from Tejgaon Airport.  The airport is the hub of most of the private airlines in Bangladesh, including Biman Bangladesh Airlines, Regent Airways, Novoair and US-Bangla Airlines.  The airport's IATA code – "DAC" is derived from "Dacca", the previously used spelling for "Dhaka". Libyan Arab Air Cargo (Libac) is a cargo airline based in Tripoli, Libya.  It is the cargo division of Libyan Airlines, operating all-cargo services.  Its main base is Tripoli International Airport.  It serves destinations throughout Africa, Europe, and Asia. Libyan Airlines (Arabic: الخطوط الجوية الليبية‎ ‎ ; transliterated: al-Khutut al-Jawiyah al-Libiyah), formerly known as "Libyan Arab Airlines" over several decades, is the flag carrier of Libya.  Based in Tripoli, it operates scheduled passenger and cargo services within Libya and to Europe, North Africa and the Middle East, the majority of which leave from Tripoli International Airport.  Benina International Airport in Benghazi serves as a secondary base.  Libyan Airlines also operates Hajj services. Chengdu Shuangliu International Airport (IATA: CTU, ICAO: ZUUU) is the major international airport serving Chengdu, the capital of China's Sichuan Province.  Located about 16 km southwest of downtown Chengdu to the north of Shuangliu District, Shuangliu airport is an important aviation hub to Western China.  Shuangliu Airport is one of the two core hubs for Air China, together with Beijing, as well as the main hub and headquarters for Sichuan Airlines and Chengdu Airlines.  China Eastern Airlines, Shenzhen Airlines, Lucky Air and Tibet Airlines also have bases at Shuangliu Airport. Benina International Airport (IATA: BEN, ICAO: HLLB) (Arabic: مطار بنينة الدولي‎ ‎ ) serves Benghazi, Libya.  It is located in the town of Benina, 19 kilometres (12 mi) east of Benghazi, from which it takes its name.  The airport is operated by the Civil Aviation and Meteorology Bureau of Libya and is the second largest in the country after Tripoli International Airport.  Benina International is also the secondary hub of both Buraq Air and flag carrier, Libyan Airlines.  As of 17 July 2014 all flights to the airport were suspended due to fighting in the area. Tripoli International Airport (IATA: TIP, ICAO: HLLT) (Arabic: مطار طرابلس العالمي) is an international airport built to serve the capital city of Libya.  The airport is located in the area of Qasr bin Ghashir 34 kilometers (21 miles) from central Tripoli.  As part of the 2014 Libyan Civil War, the airport was heavily damaged in the Battle of Tripoli Airport.  It used to be the hub for Libyan Airlines, Afriqiyah Airways and Buraq Air. Bishop International Airport (IATA: FNT, ICAO: KFNT, FAA LID: FNT) is a commercial and general aviation airport located in Flint, Michigan.  It is named after banker and General Motors board member Arthur Giles Bishop (April 12, 1851 – January 22, 1944), who donated 220 acres of his farmland for the airport in 1928.  The third busiest airport in Michigan, it surpassed competitor MBS International Airport in terms of airline operations in 2002.  In 2007, 1,071,238 passengers used Bishop International Airport; in 2011, 938,914 passengers used the airport.  It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a small hub primary commercial service facility.  The airport is currently served by several passenger airlines: Allegiant Air, Southwest Airlines and Delta Air Lines operate mainline service out of the airport, as well as affiliates of Delta Connection, United Express and American Eagle.  Additionally, FedEx Express and a FedEx Feeder affiliate operate cargo services out of the airport.  Accompanying the airlines is fixed-base operator Av Flight that handles both general aviation and airline operations and the flight school American Wings Aviation.  Bishop International Airport is in southwestern Flint, and is surrounded by Flint Township to the north, east and west; and Mundy Township to the south. Antonio B. Won Pat International Airport (IATA: GUM, ICAO: PGUM) , also known as Guam International Airport, is an airport located in Tamuning and Barrigada, three miles east of the capital city of Hagåtña (formerly Agana) in the United States territory of Guam.  The airport is a hub for United Airlines and Asia Pacific Airlines and is also the home of the former Naval Air Station Agana.  The airport is the only international airport in the territory.  It is named after Antonio Borja Won Pat, the first delegate from Guam to the United States House of Representatives, and is operated by the A.B. Won Pat International Airport Authority, Guam (GIAA, Chamorro: "Aturidat Puetton Batkon Airen Guahan Entenasionat" ), an agency of the Government of Guam. Philadelphia International Airport (IATA: PHL, ICAO: KPHL, FAA LID: PHL) , often referred to just by its IATA code PHL, is a major airport in Philadelphia, Pennsylvania, United States, and is the largest airport in the Delaware Valley region and in the state.  The airport is a major international hub for American Airlines and a regional cargo hub for UPS Airlines.  Philadelphia International Airport is also a focus city for ultra low cost airline Frontier Airlines.  The airport has service to destinations in the United States, Canada, the Caribbean, Latin America, Europe, and the Middle East.  Most of the airport property is located in Philadelphia proper.  The international terminal and the western end of the airfield are located in Tinicum Township, Delaware County.  PHL covers 2,302 acres (932 ha).
Answer: Libyan Arab Airlines