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Science Channel – Building Giants: Season 2 (2019) Episode 6 Mega Mountain Tunnel

Building Giants Series 2 Part 6 Mega Mountain Tunnel 1O80p

Building Giants Series 2 Part 6: Mega Mountain Tunnel
As engineers race to build a brand-new train tunnel beneath the Alps, they use cutting-edge tech and the latest construction methods to build the world’s longest underground railroad in some of the most dangerous conditions on earth.

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