Summary
Swiss engineers have smashed through the last stretch of rock to create the longest tunnel in the world - 35.4 miles (57 kilometres).
A gigantic drilling machine broke the remaining wall more than 8,200ft (2,500m) below the imposing Piz Vatgira peak in the Gotthard massif several minutes ahead of schedule.See the full content of this document
Extract
Breakthrough for World's Longest Tunnel
Miners, ...
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