Foreign Minister Hor Namhong is to pay an official visit to the United States in September, when he expects to hold talks with Secretary of State Hillary Clinton, he told reporters Wednesday. "I agreed to meet with her during my trip to the UN General Assembly in New York in September," Hor Namhong said. He said that Clinton had drawn links between the challenges faced by the countries of the lower Mekong River and those stemming from pollution in the United States' Mississippi River, and that she was hoping to encourage cooperation along the Mekong to help manage pollution.