Pakistan International Airlines (PIA) is Pakistan's national flag carrier airline. It was founded in 1946 and operates a fleet of over 30 aircraft. PIA's main hub is in Karachi with secondary hubs in Lahore and Islamabad. The airline faces various legal issues, including tax demands from authorities and lawsuits from former employees. It also has ongoing capital commitments and contingencies relating to letters of credit, guarantees, and aircraft purchase agreements.