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TIL in 1891 Chicago issued a challenge to all engineers to build a structure that would surpass The Eiffel Tower. The engineer who won proposed a giant rotating wheel that will lift visitors high above the city. The inventor of this giant wheel's name was George Ferris.

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GYB05 TIL that One World Trade Center had a flood that trapped people inside elevators. An expert claims that this shouldn't have happened and may indicate a design flaw in the tower.
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