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US Defence Secretary Jim Mattis will be retiring "with distinction" at the end of February, President Donald Trump announced on Thursday. His departure seems to have been the result of a sharp disagreement with the president over Mr Trump's decision to pull US troops out of Syria. For the reaction in Washington we speak to Katie Bo Willimas, senior national security correspondent with Defense One. London's Gatwick Airport has cancelled flights in and out after two drones were spotted flying above the runway. About 110,000 passengers have been affected by the ensuing flight disruption. We speak to physicist Kevin Poormon at the University of Dayton Research Institute in Ohio, who's studied the impact drones can have on planes. Every year the average UK household throws away $900 worth of perfectly edible food. It's been described as a "scandal", given the number of starving people in the world. As a result countries and companies are making greater efforts to reduce the amount that's thrown away, as Mike Johnson reports.

All this and more discussed with our two guests throughout the show: Jasper Kim, Director of the Center for Conflict Management, in Seoul. And Erin Delmore, Senior Political Correspondent for the Bustle website in New York.

(Photo: General Jim Mattis. Credit: Getty Images.)