Marlo Thomas has dedicated her life to making a difference. She first rose to fame in 1966 with her star-making role in the hit TV show, “That Girl.” Since then, she’s won Emmy Awards, Golden Globes, a Peabody, a Grammy and the Presidential Medal of Freedom. Thomas earned even more honors due to her tireless philanthropic work, especially with St. Jude’s Children’s Research Hospital. She talks about her latest book, “What Makes a Marriage Last,” co-written with her husband of 40 years, Phil Donahue. She reveals how they’ve lasted all these years and shares stories they collected from some of their famous friends, such as Billy and Janice Crystal, Michael J. Fox and Tracy Pollan, and Kevin Bacon and Kyra Sedgwick.