Chicago Spire gets green light to become nation's tallest building

05/16/2007 | USA Today

The Chicago City Council has approved a zoning change that clears the way for the construction of the already famous 2,000-foot twisting skyscraper that will be known as the Chicago Spire. The tower, designed by renowned architect Santiago Calatrava, will rise well above the city's 1,451-foot Sears Tower to become the tallest building in the U.S.

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