NOVA: Determined - Fighting Alzheimer's

Three women at risk of developing Alzheimer's join a groundbreaking study to try to prevent the disease, while sharing their ups and downs, anxiously watching for symptoms, and hoping they can make a difference. Producers: Laurie Cahalane, Therese Barry-Tanner, Eileen Littig, Maggie Bowman, Julia Reichert. Narrator: Jeannette Robinson.