A Swiss Air Force mechanic checks a Eurocopter 635 helicopter at a base near Davos
A Swiss Air Force mechanic checks a Eurocopter 635 helicopter at a base near Davos January 22, 2013. Up to 5,000 soldiers will be on duty for the annual World Economic Forum which will be held from January 23 to 27. REUTERS/Denis Balibouse (SWITZERLAND - Tags: POLITICS BUSINESS MILITARY)