July 28, 1945
--Two days after receiving it, the Japanese leadership rejected the Potsdam declaration calling for their "unconditional" surrender, or seemed to. The official word was that it would ignore the demand mokusatsu, or "with silence." Another translation, however, is "to withhold comment." This not-quite-rejection has led some historians to suggest that the U.S. should have pursued the confusing Japanese peace feelers already circulating, especially with suggestions that unconditional terms were the main, or perhaps only, obstacles.
--Secretary of the Navy James V. Forrestal had breakfast with Truman at Potsdam. He had flown there at least partly to press the president to pursue Japanese peace feelers--especially concerning letting them keep their emperor-- before using the bomb and killing countless civilians.
--Returning to Washington from Potsdam, Secretary of War Henry Stimson consulted with the top people at Los Alamos about the bomb (or "S-1" as it was then known) and wrote in his diary. "Everything seems to be going well."
--U.S. Ambassador to Moscow Joseph Davies wrote in his diary that Secretary of State James Byrnes was overly excited by the success of the bomb test vis-a-vis future relations with our allies, the Soviets: "Byrnes' attitude that the atomic bomb assured ultimate success in negotiations disturbed me more than his description of its success amazed me. I told him the threat wouldn't work, and might do irreparable harm." Four days earlier, Byrnes aide Walter Brown had written in his diary that Byrnes' view was that "after atomic bomb Japan will surrender and Russia will not get in so much on the kill." The Soviets were scheduled to enter the war on August 7 (which might have prompted a Japanese surrender, even without use of the Bomb), so there was some urgency.
--A U.S. bombing raid on the small Japanese city of Aomori -- which had little military significance beyond being a transportation hub -- dropped 83,000 incendiaries and destroyed almost the entire city, killing at least 2,000 civilians.