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S1 E1: Episode 1 Preview | One World Trade Center

One World Trade Center, the tallest building in the western hemisphere and a famous modern landmark, is engineered to be the safest and strongest skyscraper ever built. This episode follows the final year of exterior construction, culminating with the milestone of reaching the symbolic height of 1,776 feet.
Aired: 2/5/2014 | 0:00:30
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