by Ben Simon ERTSFELD, Switzerland (AFP) — The world’s longest train tunnel will officially open on Wednesday, nearly seven decades after the initial design was conceived. Switzerland’s 57-kilometer (35-mile) Gotthard Base Tunnel runs under the Alps from Erstfeld in the central canton of Uri, to Bodio in the southern Ticino canton. The rough design for a rail tunnel under the Gotthard Pass was first sketched by Swiss engineer Carl Eduard Gruner in 1947. But bureaucratic […]