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Skyscrapers that are pushing the limits of engineering, technology and design are featured in this four-part series, which opens with a look at One World Trade Center, the tallest building in the western hemisphere. Included: the final year of exterior construction, which culminates with the milestone of reaching the symbolic height of 1776 feet.
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Episode 1
Wed, Feb 5, 201458 mins
One World Trade Center is engineered to be the safest and strongest skyscraper ever built. Follow the final year of exterior construction, culminating with the milestone of reaching the symbolic height of 1,776 feet.






