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: A trained anthropologist decided to aim to lead his nation; next steps for stabilizing progress in Afghanistan; Afghan president's relationship with the American president; assessment of President Trump's new military plans for Afghanistan. Guests are Javad Zarif and Ashraf Ghani.