The United States Air Force (United States Air Force, the abbreviation for the USAF) is part of the U.S. Army Air Force. Its mission is "to protect the United States and its interests through air and space force, it was formally established on September 18, 1947. U.S. Air Force is the world's largest scale, the technical force is the most developed Air Force.U.S. Air Force is mainly composed by four parts of the strategic forces, tactical forces, space forces and special operations forces, the preparation sequence for the Air Force wing, the battalion and squadron of four; allocated a total of 14 Air Force 45 Air Wing and 1286394 aircraft squadrons, major equipment (3267 combat aircraft, transport aircraft, 1158), ICBMs 580 (of which 530 Minuteman III missile, MX missile, 50).
As of September 30, 2006, the U.S. Air Force equipped with a total of about 160 unmanned aircraft and manned aircraft 4,282 aircraft (including 172 bombers, fighters of 1,619 aircraft, 160 helicopters, reconnaissance aircraft, AWACS 137 special operations aircraft 103 frame, 278 aerial refueling tanker, trainer of 1,284 aircraft, transport planes, 529), another air Force National Guard, 1,321 aircraft, and air Force Reserve, 410; 2,161 pieces of space-based cruise missiles, and 580 intercontinental ballistic missiles and 46 satellites.