'The Notebook' actor Gena Rowlands has Alzheimer's, son reveals

The son of actor Gena Rowlands, known for her role as an aging Allie Calhoun in "The Notebook,'' reveals she has Alzheimer’s — the same disease her character battled on screen. NBC's Kaylee Hartung reports and medical contributor Dr. Tara Narula joins TODAY to discuss the progression of the disease and risk factors.