# Department of the Air Force One of the three military departments within the [[Department of Defense]], created by the National Security Act of 1947. Uniquely among the three, it houses **two** armed services: the [[U.S. Air Force]] and, since 2019, the [[U.S. Space Force]]. Headed by a civilian Secretary — currently [[Troy Meink]] — who exercises authority over both. > [!note] Stub — fill out > The 1947 split from the Army, the secretariat structure, and how budget authority is divided between the two services.