This is the gripping history of the Nazi-sponsored attempt to infiltrate the 1943 wartime Allied conference in Tehran and to assassinate the "Big Three" leaders: Franklin Roosevelt, Winston Churchill, and Joseph Stalin. It shows how close the plot came to success, and how the removal of any one or more of the Allied chiefs might have significantly altered the future course of the Second World War. Intended to be led by the SS lieutenant colonel Otto Skorzeny, Operation Long Jump was ultimately detected by Soviet agents, and it remains one of the most tantalizing 'what-if' questions of the 20th century.