What city does Jaros, Baum & Bolles and Willis Tower have in common?
Jaros, Baum &amp; Bolles:  The firm is best known for high-rise projects, including One World Trade Center and Hudson Yards in New York City, the Sears Tower in Chicago and the Bank of China Tower in Hong Kong. Willis Tower: The Willis Tower, built as and still commonly referred to as the Sears Tower, is a 110-story, 442.1 m skyscraper in Chicago, Illinois, United States.
Chicago