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Sears Tower

Dates: 
Tuesday, May 15, 1973
Sears Tower

 

The Willis Tower, built as and still commonly referred to as Sears Tower, is a 108-story, 1,451-foot (442 m) skyscraper in Chicago, Illinois, United States. At completion in 1973, it surpassed the World Trade Center towers in New York to become the tallest building in the world, a title held for nearly 25 years. As of December 2013, the Willis Tower is the second-tallest building in the United States and the eighth-tallest freestanding structure in the world. More than one million people visit its observation deck each year, making it one of Chicago's most popular tourist destinations. The structure was renamed in 2009 by the Willis Group as part of its lease on a portion of the tower's space.

As of December 2013, the building's largest tenant is United Airlines, which moved its corporate headquarters from the United Building at 77 West Wacker Drive in 2012 and today occupies around 20 floors with its headquarters and operations center.

Credit: 
http://en.wikipedia.org/wiki/Willis_Tower