The U.S. State Department reportedly shares the International Atomic Energy Agency's grave concerns over North Korea's nuclear activities.<br />This according to a source who spoke to Voice of America on Friday.<br />The source added that verification of any denuclearization agreement with the North will be difficult and a process that will have to involve the IAEA.<br />The UN's nuclear watchdog said this week that it has reason to believe North Korea is still operating its main nuclear site in Yeongbyeon.<br />The head of the IAEA also called on North Korea to allow international inspectors into the regime so they can independently verify Pyeongyang's nuclear activities. <br />
