qnli question: Who was over the new U.S. Strategic Air Forces in the Pacific command? sentence: On 26 July 1945, the President of the United States Harry S. Truman, the President of the Nationalist Government of China Chiang Kai-shek and the Prime Minister of Great Britain Winston Churchill issued the Potsdam Declaration, which outlined the terms of surrender for the Empire of Japan as agreed upon at the Potsdam Conference.