NPR News Amid Sudan's Unrest, Ambassador Sees Chance For New Nation By NPR Staff Published June 21, 2011 at 10:00 AM MDT Facebook Twitter LinkedIn Email Your browser doesn’t support HTML5 audio Ambassador Princeton Lyman at the announcement of his appointment as the new U.S. Special Envoy for Sudan, March 31, 2011, at the State Department in Washington.Evan Vucci Copyright 2011 NPR