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.Fareed welcomes South African human rights lawyer and the founder of the Health Justice Initiative in South Africa, Fatima Hassan, to discuss travel bans and the unequal distribution of vaccines around the world. Then, will the vaccines hold up against the Omicron variant? Fareed asks Moderna's founder and chairman, Noubar Afeyan. Also, with tensions on the Russia-Ukraine border increasing, Fareed talks to former NATO Supreme Allied Commander James Stavridis about the upcoming Biden-Putin call and the likelihood of a Russian invasion of Ukraine. Then, after this round of Iran nuclear deal talks ended poorly Friday in Vienna, Vali Nasr, professor at John's Hopkins University and former senior adviser at the U.S. State Department, tells Fareed why Iran is hesitant to continue negotiations and why the U.S. needs a deal to stabilize the Middle East. Plus, how did the Taliban retake Afghanistan quickly and relatively peacefully? Margherita Stancati, a reporter at the Wall Street Journal, reveals their spy tactics and hidden networks.