When refugees leave their homes, they’re gambling that some place new will welcome them. Viet Thanh Nguyen knows that experience well as a refugee from Vietnam after the fall of Saigon. On World Refugee Day, he joins us to talk about the many obstacles that can stand in the way of making a new home in a foreign place. The Pulitzer Prize-winning novelist is the editor of the essay collection “The Displaced: Refugee Writers on Refugee Lives” (Abrams Press).