As plenty of Journalists can tell you, nothing gets an interview with a superstar off to a better start than a friendly introduction. A different tradition, however, seems of to prevail in the West African Republic of Senegal, the home the world-music superstar and the Mango Records recording artist Baaba Maal, who spent a few days last month conducting phone interviews to publicize his forth-coming 19-city tour of the U.S. "Before you start the interview," war...