SOTU Preview; David Agus; Remembering David Bowie

TV hosts Al Hunt and Tavis Smiley and political consultant Frank Luntz join guest host Matthew Dowd in previewing President Barack Obama's 2016 State of the Union address. David Agus, professor of medicine and engineering at USC's Keck School of Medicine, discusses his new book, "The Lucky Years," which explores how medical science can extend and improve human life as never before. Guest host Tavis Smiley remembers David Bowie with a look back at the singer's appearances on the show.