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Modern Marvels
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S13E34: World's Sharpest

Modern Marvels · Season 13
Aired 11 Oct 2007 at 2:00am (UTC)
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Synopsis

From collapsing floodwalls in New Orleans to high-tech mechanical storm surge barriers in Europe, we'll explore the 2,500-year history of keeping rivers and tides at bay by erecting levees.

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