A massive 10m (30-foot) boring machine was used to drill the 57.1km (35-mile) tunnel, which has taken 17 years to complete The world's longest - and deepest - rail tunnel opens in Switzerland on Wednesday. The Gotthard rail link has taken 20 years to build, and cost more than $12bn (£8.2bn). It will, the Swiss say, revolutionise Europe's freight transport. The Alps are sometimes described as Europ
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