Secretary of State Condoleezza Rice warned North Korea to reconsider its choice to break off disarmament talks or face deepening isolation from the rest of the world and greater suffering for its people. Rice was responding to North Korea’s announcement that it has built nuclear weapons and was abandoning the talks. Some analysts say the North Korean move was aimed at extracting concessions from Washington before any reconvening of the nuclear talks among the United States, two Koreas, Japan, Russia and China.