Nancy SoderbergNANCY SODERBERG has served as a high-ranking White House National Security Adviser and as a U.S. Ambassador to the United Nations. She is the author of The Superpower Myth, and her commentary has appeared in publications including the <>Los Angeles Times, the New York Times, and the American Prospect. She has appeared on The Newshour with Jim Lehrer, The Daily Show, Crossfire, and many other programs.