Divorce, David Macaulay, Edward Norton

Hosted by Jane Pauley. In our cover story, Susan Spencer reports on the challenges couples face in keeping a marriage intact, in spite of a decline in the divorce rate.Also: Mo Rocca looks back at 50 years of “Saturday Night Live”; Tracy Smith talks with Oscar nominee Edward Norton, star of the Bob Dylan biopic “A Complete Unknown”; Robert Costa talks with author Michael Lewis about his upcoming book, Who Is Government?, highlighting the critical work being done by federal government workers; Martha Teichner profiles bestselling author and illustrator David Macaulay, known for his classic book The Way Things Work; Conor Knighton has the story of the Humane Society of the United States, which is now being renamed Humane WORLD for Animals.