How Marca Bristo changed Americans' minds about disabilities

Marca Bristo may not have been a household name, but her influence permeated American society. At age 23, Bristo was paralyzed from the waist down in a diving accident. She became a disability rights activist, working to improve access, fight discrimination and create a model for independent living. Bristo died Sunday at age 66. Judy Woodruff talks to former Sen. Tom Harkin about her legacy.