NO WEB/NO APPS - General view of the emergency gallery of the Gotthard Base Tunnel (GBT), in Erstfeld, Switzerland in March 2016. The Gotthard Base Tunnel (GBT) is a railway tunnel through
Journalists take pictures during their visit to the construction site in the NEAT Gotthard Base tunnel near Sedrun April 2, 2013. Crossing the Alps, the world's longest train tunnel should become operational
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Journalists visit an escape tunnel at the construction site of the new 2.7 kilometres/1.68 miles long dual-track Boezberg railway tunnel near Schinznach Dorf, Switzerland April, 1, 2019. REUTERS/Arnd Wiegmann Stock Photo - Alamy
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