“This is a new day,” Gen. Henry H. “Hap” Arnold declared to the members of the Senate Military Affairs Committee. The date was October 19, 1945, and the Commanding General of the Army Air Forces (AAF) was testifying on the importance of legislating a new national security organization that would feature an independent Air Force. General Arnold’s masterful opening statement to the committee portrayed in microcosm the history and impact of airpower.