The United States says North Korea understands that it must agree to a plan to verify its nuclear declaration to make progress in disarmament talks. State Department spokesman Robert Wood told reporters Tuesday that there "shouldn't be any confusion" about what North Korea needs to do and that the United States has been clear about the need for a verification plan. He says the United States is waiting for the North to act. North Korea pledged to declare its nuclear programs fully by the end of last year in exchange for energy aid and its removal from a U.S. terror blacklist. North Korea demolished its nuclear reactor's cooling tower and submitted its long-delayed nuclear declaration in June. Washington has said it will remove North Korea from the terror list only after it has agreed to a full nuclear verification plan.