SEOUL, Aug. 1 (UPI) -- The top diplomats of the United States and South Korea reaffirmed their commitment to the complete denuclearization of North Korea and the enforcement of international sanctions against Pyongyang during a meeting in Washington on Thursday, both governments said. U.S. Secretary of State Marco Rubio and South Korean Foreign Minister Cho Hyun held their first talks since the election of South Korean President Lee Jae Myung last month. Their meeting took place one day after U.