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World's Largest Train Tunnel
Reuters
A miner stands in front of the drill machine "Sissi" after it broke through the rock at the final section Faido-Sedrun, at the construction site of the NEAT Gotthard Base Tunnel in Switzerland on October 15, 2010. With a length of 57 km (35 miles) crossing the Alps, the world's longest train tunnel should become operational at the end of 2017.
