April 3
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What links here
Willis Tower
Cook County, Illinois
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Chicago Loop
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SOM (architectural firm)
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Aon Center (Chicago)
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Chicago River
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John Hancock Center
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Richard M. Daley
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1973
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1990s
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History of the world's tallest structures
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1 World Trade Center (1970–2001)
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United Airlines
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Skyscraper
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Closings and cancellations following the September 11 attacks
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March 27
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Empire State Building
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Daily Planet
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Chicago
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CN Tower
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