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
Priory of Sion 1889 and 1895, which is problematic considering that de Sède's book was trying to make a case that these documents were centuries old. In 1969, English actor and science-fiction scriptwriter Henry Lincoln became intrigued after reading "Le Trésor Maudit". He discovered one of the encrypted messages, which read ""À Dagobert II Roi et à Sion est ce trésor, et il est là mort"" ("To Dagobert II, King, and to Sion belongs this treasure and he is there dead"). This was possibly an allusion to the tomb and shrine of Sigebert IV, a real or mythical son of Dagobert II which