A panel discussion was held on the critical relationship between the two great superpower leaders, Ronald Reagan of the United States and Mikhail Gorbachev of the Soviet Union. The panelists discussed how and why they came together, how they changed the world, and lessons for the future. They responded to questions from members of the audience. Lesley Stahl moderated.   "Reagan/Gorbachev: Did They End the Cold War Forever?" was part of the New York Historical Society Harold and Ruth Newman World Beyond Tomorrow Series. The event was held March 17, 2011, at the New York Society for Ethical Culture.