with our networkwide series, the cost of care, as we mark national family caregivers month. >> patti davis we both come from political families and we both know firsthand the strain and heartbreak of caring for a father struggling with alzheimer's. now in her new book, davis reveals the disease also helped her reconnect with her father and in so doing, she reconnected with herself >> when i remember my father, i think of his eyes. as a child, i searched for them, wanting for them to focus on me. i thought nothing could get the best of him. a lifetime later, i would watch him stand helplessly in front of a beast he could not slay. >> reporter: for his millions of supporters, president ronald reagan was considered a national hero >> my fellow americans, on behalf of both of us, good-bye and god bless each and every one of you. >> reporter: but growing up as his daughter wasn't easy patti davis says he was often detached and unavailable now in her new memoir, "floating in the deep end," davis chronicles rediscovering her father through his struggle with alzheimer's. you write in the book that