UNITED NATIONS - A Manhattan-based public-relations firm, whose founder is described as a close friend of Secretary-General Annan, received approximately $100,000 for work it did for the Nigerian government when the African country was ruled by a brutal dictator, Sani Abacha. The firm, Ruder Finn, registered as a lobbyist for Nigeria in March 1998, three months before Abacha died. An executive of the firm, Emmanuel Tchvidjian, told The New York Sun, however, that after conducting a survey for the Nigerian regime, it dropped the account. "We don't do business with dictators," Mr. Tchvidjian, a senior vice president of Ruder Finn,...