Passengers queue for the Eurostar cross-Channel train, at Gare du Nord station in Paris, Wednesday, March 13, 2013. Snow and freezing temperatures continue to cause travel chaos Wednesday as some hundreds of flights in Europe have been canceled, trains are disrupted and some roads impassable. Seemingly unprepared for this heavy snow, cities across much of Europe are struggling to assure transport links. (AP Photo/Thibault Camus), APTOPIX