Thanks to the World Economic Forum (WEF) that opens tomorrow in Davos, Switzerland, WingX Advance expects business aviation traffic this week to be twice that of normal levels at Zurich, Duebendorf, Altenrhein and St. Moritz Airports. Last year’s WEF was the busiest in three years and doubled the rest-of-year daily frequency of business aviation movements at these four principal WEF airports …19