Construction of the World Trade Center
Season 16
About the Episode
The foundations themselves presented the first challenge. They would have to descend through 70 ft. of water-logged landfill before reaching bedrock. The greatest challenge by far, however, lay in the engineering of the towers themselves. The solution, developed by the structural engineers John Skilling & Leslie Robertson in the mid-1960s, was to re-conceive the basic structure of tall buildings.
Aired:
| Expires: | Runtime: 2m 07s
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Extras
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Trailer | Clearing the Air: The War on Smog
Watch a preview of Clearing the Air: The War on Smog.2:22 -
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Why do people shake Polaroid pictures?
We were told to "shake it like a Polaroid picture". But what if we got it wrong?1:58 -
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Fighting Environmental Racism In L.A. County
Thousands of Superfund sites have been identified across the United States.4:40 -
What if you found 22,000 tons of toxic waste in your own backyard?
22,000 tons of toxic waste in your own backyard3:57 -
Why the Pap smear almost never saw the light of day | What the History?!
What do guinea pigs, eugenics and Japanese incarceration during WWII have in common?5:04 -
The surprising reason why women were included in the 1964 Civil Rights Act | What The History?!
Did you know that the Civil Rights Act of 1964 wasn’t supposed to include job protections for women?3:43 -
Civil Rights in the Sky: The woman who paved the way for Black flight attendants
Learn how Pat Banks Edmiston broke barriers in the sky.4:53 -
