 We need to focus on the Cold War. I remember teaching a course in the late 1990s to a group of American students in Europe. And it was a story about the Cold War and national security. I mean, the course was. And I had to explain to them, Paul, at the beginning, that Germany was in two halves. They didn't know that there was a West Germany and an East Germany. What's the most important thing that we need to teach