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: America's broken politics; the week in global politics; a military confrontation between the U.S. and North Korea; why the filmmaker for ``An Inconvenient Sequel'' Al Gore remains optimistic about the environment. Guests are Julia Ioffe, Gideon Rose, and Dan Senor.