Modern Marvels

Season 14 Episode 15

Welding

1
Aired Wednesday 10:00 PM May 09, 2007 on The History Channel

Trivia

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  • Trivia

    • In December 2006, 27 mega-steel columns were arc-welded together to anchor New York's Freedom Tower at the former site of the World Trade Center. Each column stands more than five stories tall and weighs as much as 30 tons.

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