Sion Airport PC-6, Pilatus PC-7, Pilatus PC-9 and Pilatus PC-21 as well as helicopters it uses Sion intensively with the fighter jets F/A-18 and F-5 Tiger. It is the home base of the militia pilot unit Fliegerstaffel 19 Swans with F-5E. Sion Airport is, at both ends of the runway, equipped with retractable arresting gear devices (used by the F/A-18 and in case of a problem by the F-5). Because of the redimension of the Swiss Air Force it is planned that the Air Force will leave Sion after 2017 and Sion will be used by civil aviation only, acting only as
Sion Mills Sion Mills Sion Mills is a village to the south of Strabane in County Tyrone, Northern Ireland, on the River Mourne. In the 2001 Census it had a population of 2,050 people. It is a tree-lined industrial village and designated conservation area, particularly rich in architectural heritage. The village of Sion Mills was established by the Herdman family in 1835. The family operated a linen production mill in the village. The name "Sion" comes from the townland of "Seein", which lies to the south of the village. It is an anglicisation of an Irish placename: either "Suidhe Fhinn" (meaning "seat