Stimson, who had just finished a series of arguments with the British about the need for an invasion of France, was reluctant to appear to disagree with them about everything, and spoke in conciliatory terms about the need for good post-war relations between the two countries. For his part, Churchill disavowed interest in the commercial applications of nuclear technology. The reason for British concern about the post-war cooperation, Cherwell explained, was not commercial concerns, but so that Britain would have nuclear weapons after the war. Anderson then drafted an agreement for full interchange, which Churchill re-worded "in more majestic language". News arrived in London of Roosevelt's decision on 27 July, and Anderson was dispatched to Washington with the draft agreement. Churchill and Roosevelt signed what became known as the Quebec Agreement at the Quebec Conference on 19 August 1943.