Berlin Tegel Airport mid- to late 1960s' introduction by Pan American World Airways (Pan Am) and British European Airways (BEA) of jet aircraft with short-field capabilities that were not payload-restricted on Tempelhof's short runways, Air France experienced a traffic decline on those routes where it competed with Pan Am and BEA, mainly as a result of Tegel's greater distance and poorer accessibility from West Berlin's city centre. Over this period, the French airline's market share halved from 9% to less than 5% despite having withdrawn from Tegel–Düsseldorf in summer 1964 and concentrated its limited resources on Tegel–Frankfurt and Tegel–Munich to maximise the competitive
Knox County Regional Airport operated by the City of Rockland until 1968. It was then turned over to Knox County and renamed "Knox County Regional Airport". Since that time, the airport has been developed, the runways expanded, and an Instrument Landing System (ILS) was installed. Knox County Regional Airport covers an area of 538 acres (218 ha) at an elevation of 56 feet (17 m) above mean sea level. It has two asphalt paved runways: 13/31 is 5,007 by 100 feet (1,526 x 30 m) and 3/21 is 4,000 by 100 feet (1,219 x 30 m). For the 12-month period ending July 31, 2010,