Journalist and author Fareed Zakaria hosts this in-depth look at the major global developments of the week (the title's "GPS" stands for "Global Public Square"), with an emphasis on new ideas and innovative solutions to the world's toughest problems. Each episode also features Zakaria leading a panel discussion and interviewing a major world figure.This week: The P5 plus 1 deal with Iran; North Korea's rumbling; ISIS largely defeated in Raqqa; what happened to the 4 dead American servicemen in Niger; understanding China's President Xi and his intentions; tense moments in the NAFTA negotiations. Guests are Norman Roule, David Sanger, Anne-Marie Slaughter, Elizabeth Economy, Jiayang Fan, and Chrystia Freeland.