Willis Tower KWO39, programmed by the National Weather Service Weather Forecast Office in Chicago, is equipped with Specific Area Message Encoding (SAME), which sets off a siren on specially-programmed weather radios to alert of an impending hazard, such as a tornado or civil emergency. The building has appeared in numerous films and television shows set in Chicago such as "Ferris Bueller's Day Off", where Ferris and company watch the streets of Chicago from the observation deck. The television show "Late Night with Conan O'Brien" introduced a character called The Sears Tower Dressed In Sears Clothing when the show visited Chicago in 2006.
The Gogo Building district along the Chicago River. There are two large red brick buildings along the Chicago River just south of where the river splits, formerly known as the Butler Brothers Warehouse buildings. They were both designed for the Butler Brothers Company, a mail order company, similar to Montgomery Ward's and Sears & Roebuck at the time. The northern structure was designed by Daniel Burnham, a famous Chicago architect, with its completion date being 1913, a year after Burnham’s death. This building only stood for 7 years before being completely demolished and rebuilt exactly as it stood before by the Chicago Union