CHICAGO (WLS) -- Chicago is all lit up on Sunday night, celebrating the 50th birthday of "Good Morning America."
The Willis Tower is among the buildings in GMA colors.
Buildings across the country are lighting up to say thanks for 50 years.
On Monday morning, starting on Eyewitness News at 4:30 a.m., we will have special coverage, including behind-the-scenes footage and interviews from when ABC7's Terrell Brown visited GMA last week.
The Walt Disney Company is the parent company of this ABC station.