The landscape of Chicago from the top of Willis Tower, formerly named Sears Tower, a 108-story, 1,451-foot (442 m) skyscraper in Chicago, Illinois. It is now the tallest building in the United States and the fifth-tallest freestanding structure in the world. As the largest city in the US state of Illinois, Chicago is a major hub for industry, telecommunications and infrastructure in the country. [Photo by Xu Lin/China.org.cn] |
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