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Watch Modern Marvels Season 7 Episode 3 Online
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- COUNTRIES: United States of America
- Subtitles: English
The challenge of linking Britain and France with a tunnel under the English Channel was both monumental and delicate. It took 18 months just to design and build the 28 foot diameter TBMs, and nearly a year to assemble and position them underground. Modern Marvels takes you through the entire process from start to finish.
