Visiting US, Chinese and Russian experts were set to continue their tour of North Korea's main nuclear complex Thursday, after US officials said the communist nation had cooperated with their requests. The US officials were in Pyongyang to determine how to disable the Yongbyon facility so it cannot produce more bombs, part of an agreement reached between American and North Korean envoys earlier this month. The American delegation was to return to the capital, Pyongyang, for discussions with North Korean officials, US State Department spokesman Sean McCormack said in Washington. The leader of the delegation, the State Department's top Korea expert, Sung Kim, told officials in Washington they "saw everything they had asked to see," McCormack said.