WTTW-TV (Channel 11) is the Chicago Illinois affiliate of the Public Broadcasting Service. The station began broadcasting in 1955 and is owned and operated by Windows to the World Communications Inc. (Get it? WTTW/Windows to the World?) a not-for-profit broadcasting entity. WTTW continues to broadcast it's educational and informational programming in part because of the continued support of it's viewers and funding by other not-for-profit organizations such as the Corporation For Public Broadcasting. WTTW also owns and operates 'The Chicago Production Center' a video production and editing facility and a classical music radio station WFMT located at 98.7FM.

On November 22,1987 at 11:00pm WTTW's broadcast signal was hijacked by an unknown person wearing a Max Headroom mask for approximately 90 seconds. This was the second incident that night involving the interruption of a television station's broadcast signal. Approximately 2 hours prior to the WTTW incident, Chicago Superstation WGN-TV Channel 9 has their broadcast interrupted by the same person during the sportscast on the 9 O'Clock News. WTTW whose transmitter is atop the Sears Tower was unable to thwart the video intruder unlike WGN whose transmitter is atop the John Hancock building who cut off the intruder's signal almost immediately.

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