On 3 November, Nagano explained in detail the plan of the attack on Pearl Harbor to the Emperor. On 5 November Emperor Hirohito approved in imperial conference the operations plan for a war against the Occident and had many meetings with the military and Tōjō until the end of the month. On 25 November Henry L. Stimson, United States Secretary of War, noted in his diary that he had discussed with US President Franklin D. Roosevelt the severe likelihood that Japan was about to launch a surprise attack and that the question had been "how we should maneuver them Japanese into the position of firing the first shot without allowing too much danger to ourselves."