The cracks formed after a group of visitors to the Skydeck at the Willis Tower stepped out on the Ledge, but Willis Tower officials said the glass itself did not crack, only the protective coating.
Completed in 1973 and for 25 years the tallest building in the world, the 110-story Willis Tower has marked a major milestone in its transformation with the completion of a new Skydeck experience ...
Aon Center's planned observation deck, Chicago's third, could create competition for tourist dollars
CHICAGO — The owners of the Aon Center, Chicago's third-tallest skyscraper, on Monday unveiled plans for an observatory atop the building, potentially setting up a heated competition for tourist ...
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