PITTSBURGH -- This weekend, thousands walked to raise money for autism research.

Sunday was the fourth annual Walk Far for NAAR at Heinz Field.

It raises funds for the National Alliance for Autism Research.

One local mother of an autistic child was touched by the thousands who showed their support.

Maggie Garofalo said, "I know how it has affected our family and my heart goes out to all of these other families. And I just think it is wonderful that there is so much support for these children."

Over the past four years, the walk has raised more than $9 million.