Catherine Grace Katz: Gunner (equal parts ginger beer & ginger ale with fresh lime juice and dash bitters) Catherine describes how Stalin made an emergency dash to the bathroom during the 1945 Yalta conference which was briefly mistaken for an American kidnapping plot, the treasures she found in personal letters of the Churchill and Harriman archives, the friendships and rivalries and sexual affairs that took place in the insular wartime diplomatic community, the key piece of advice she followed throughout the writing process to make the book a success, and which of the Big 3 had the most significant impact on the 20th century.