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
Napa County Airport It was expanded later in the war and renamed Napa Army Airfield, becoming an auxiliary airfield of the Fourth Air Force Hamilton Army Airfield. 4th Air Force used the base to train replacement fighter pilots, primarily flying P-38 Lightnings before being deployed overseas. After World War II the property was deeded to Napa County by the War Assets Administration for civil use. The airport soon became a business hub for what was once a rural, sparsely populated area in the south end of the county. Jonesy's Restaurant opened for business in 1946 at the airport and was a longtime favorite.