I received a letter from the U.S. State Department last week. It was from a program officer in the office of International Visitors thanking me for hosting three Chinese journalists who were visiting the United States as part of the State Department’s Edward R. Murrow exchange program. It was a very nice thank-you note. The last line read: “Your generosity and kindness made a lasting, positive impression, helping advance the cause of America’s public diplomacy effort.”