VACCINES – Dr. Jon LaPook reports on why vaccines are more important than ever and why some people are still skeptical. CONNIE CHUNG – Jane Pauley talks with fellow TV journalist Connie Chung and her husband, Maury Povich, about her new memoir, her impact on journalism and more. HILLARY CLINTON – Erin Moriarty talks with former Secretary of State Hillary Rodham Clinton about her new book and the upcoming election. WORD OF MOUTH – Martha Teichner profiles former New York Times restaurant critic Pete Wells. FOR THE BIRDS – David Pogue reports on the ongoing problem of birds flying into buildings and what's being done to prevent it. TAKE NOTE: LL COOL J – Kelefa Sanneh catches up with actor and rap legend LL Cool J to talk about his life, his career and his new music. ROAD TRIP: WILL FERRELL AND HARPER STEELE – Tracy Smith sits down with Will Ferrell and his friend Harper Steele to discuss their new documentary.