The U.S. State Department has vowed to focus on making its denuclearization negotiations with North Korea a success. <br /> However, an official at the department stressed that, if the North fails to denuclearize, its maximum sanctions pressure on Pyongyang will remain in full effect. <br />When asked about North Korean leader Kim Jong-un criticizing the U.S. for its hostile sanctions, the State Department said the recent talks were only possible because of the full implementation of UN Security Council resolutions. <br />It emphasized the world is concentrating on whether Kim Jong-un fulfills his promise of the final and fully verified denuclearization of the Korean peninsula. <br />