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Switzerland opens the world’s longest rail tunnel

The world’s longest and deepest rail tunnel is officially opened in Switzerland on Wednesday, after 17 years of construction work. The Gotthard Base Tunnel (GBT) is a railway tunnel through the Alps in Switzerland. With a route length of 57.09 km (35.5 mi) and a total of 151.84 km (94.3 mi) of tunnels, shafts and passages, it is the world’s longest …

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