Top News Stories Of 2020; Family Estrangement During Holidays

CNN's Christiane Amanpour joins us to discuss the top news stories of 2020. And, a survey by sociologist Karl Pillemer revealed that about 25% of people live with some kind of family estrangement, and those damaged relationships take a toll — mentally and physically. His new book, "Fault Lines: Fractured Families and How to Mend Them," addresses this, as well as how to mend these relationships. He joins us to discuss.