CNN chief medical correspondent Dr. Sanjay Gupta talks about how learning new skills can optimize brain health. His new book is 'Keep Sharp.' Book critic Maureen Corrigan reviews 'Outlawed,' a novel by Anna North, which she describes as 'Handmaid's Tale' meets 'Butch Cassidy.'Journalist Maria Ressa has faced criminal charges and death threats because of her coverage of the populist, authoritarian Philippine President Rodrigo Duterte. We talk about her work in the Philippines and the threats she's faced. Ressa is the subject of a new PBS FRONTLINE documentary, 'A Thousand Cuts.'