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: What President Trump's engagements overseas accomplished; the upsides and downsides of a meeting with Putin; Saudi Arabia's purge; the relationship between the United States and Turkey. Guests are Ian Bremmer, Richard Haass, Elise Hu, Ali Shihabi, and Binali Yildirim, Turkish Prime Minister.