On this week's special, transatlantic episode of Slate Money, Felix Salmon of Fusion, Cathy O'Neil of Columbia University and special guest John Gapper of the Financial Times discuss Citigroup's multi-billion dollar mortgage settlement, the merger of two of the largest American tobacco companies and the continuing saga of the Joint Strike Fighter, the world's most expensive fighter plane.Learn more about your ad choices. Visit megaphone.fm/adchoices