US real estate investor Blackstone Group announced on 16 March 2015 that it is buying the iconic 110-story building in Chicago, the second-tallest building in the United States. What is the name of the building?: Willis Tower
Explanation: Willis Tower is currently ranks tenth, according to The Skyscraper Center however it is known for most of its existence as the Sears Tower, the 442 meter (1,451 foot) building was the tallest building in the world for a quarter-century after its completion in 1973 till the title of the tallest building in the United States went to One World Trade Center in New York, completed two years ago. The purchase adds 3.8 million square feet of space (350,000 square meters) to New York-based Blackstone`s huge investment portfolio of real estate and related businesses around the world, including Hilton Worldwide, Invitation Homes, and Chinese shopping malls owner SCP.