Left photo: Sears Tower became the tallest building in Chicago, surpassing the John Hancock Center, seen in the background, when construction continued in November 1972. (Charles Osgood/Chicago ...

Up in the tower formerly known as Sears above ... at Canopy by Hilton Chicago Central Loop right across the street from the Willis Tower, a professional wedding photographer, and deluxe offerings ...

British insurance broker Willis Group Holdings Ltd. will lease space in the iconic Sears Tower, changing the building's name to Willis Tower. Video courtesy of Fox News.