Bill Berkeley, is an investigative reporter with The New York Times. He was previously an editorial writer for The Times, and for more than a decade reported on African affairs. His most recent book is The Graves Are Not Yet Filled: Race, Tribe, and Power in the Heart of Africa, published in 2001. He’s also served as correspondent on the African beat, Soviet Union, and the Middle East for such publications as The Atlantic Monthly, The New Republic, and The Washington Post. Mr. Berkeley teaches writing at Columbia University’s graduate school of International and Public Affairs.