Berlin Tegel Airport core of the new technology park, with up to 2,500 students. It is envisaged that the adjoining areas will be used both for research and development and for manufacturing companies. Berlin TXL will also make an 80 hectares area available for industrial uses – the largest single inner-city development area in Berlin. The area of today's airport originally was part of Jungfernheide forest, which served as a hunting ground for the Prussian nobility. During the 19th century, it was used as an artillery firing range. Aviation history dates back to the early 20th century, when the Prussian airship battalion was
Billy Bishop Toronto City Airport known as City Express. From 1984 until 1991, City Express continued and expanded its operations at the airport, peaking at 400,000 passengers annually in the mid-1980s. In 1990, Air Ontario (later to become Air Canada Jazz) started operating regional airline service to Ottawa and Montreal. That year, City Express folded in bankruptcy. In 1994, Jazz built a new terminal, moving out of trailers. That year, the airport was renamed the Toronto City Centre Airport. The Toronto Harbour Commission made plans to expand the airport so as to achieve self-sufficiency, as it was dependent on subsidies from the City of Toronto