Who are the candidates in the race for a new chief at the United Nations?

It's that time of year again, when world leaders gather in New York for the UN's biggest diplomatic event. This year's General Assembly agenda includes war and climate change, as well as who will lead the United Nations going forward. Antonio Guterres has been Secretary-General for the past decade but is set to step down at the end of the year. To break down the race for the next UN chief, The World's Host Marco Werman speaks with Stephanie Fillion, the Editor-in-Chief of Envoy Magazine.