America's tradition of openness led Chen Guangcheng to knock on its embassy door. Now that openness may allow him to study in the US. The strength of many a country lies in being open to people, ideas, and technology.
Pleas for US help like those from dissident Chen in China can wear down a superpower trying to reorient itself. Yet foreigners still look to American for moral leadership. A mature democracy should know how to resolve such dilemmas.