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.CNN's Matthew Chance reports from Kyiv on Russia's slow and steady advances in Ukraine. As Iran moved to remove 27 cameras from monitoring its nuclear sites, the director-general of the IAEA, Rafael Mariano Grossi, joins Fareed to discuss the fate of the Iran nuclear deal. Then, is the economy really that bad? Ben Bernanke, former chair of the Federal Reserve gives Fareed the economic forecast. Plus, Shannon O'Neil, a vice president and senior fellow for Latin America studies at the Council on Foreign Relations, comments on recent elections in Latin America and whether there is a populist wave from the left. And, David Gergen, presidential adviser for four presidents, discusses his new book Hearts Touched with Fire.