At the height of the Cold War, U.S. President Richard Nixon flew into communist China's center of power for a visit that, over time, would transform U.S.-China relations and China's position in the world in ways that were unimaginable at the time.
The relationship between China and the United States was always going to be a challenge, and after half a century of ups and downs, is more fraught than ever. The Cold War is long over, but on both sides there are fears a new one could be beginning. Despite repeated Chinese disavowals, America worries that the democratic-led world that triumphed over the Soviet Union could be challenged by the authoritarian model of a powerful and still-rising China.
