Description: The United States Air force is the aerial arm of the armed forces of the United States of America. The Air Force provides compelling air, space, and cyber capabilities for use by the combatant commanders of the U.S. armed forces. The Air Force maintains a size of over 330,000 active personnel in its ranks with over 5,000 aircrafts. The Air Force also maintains 63 satellites. The annual budget of the force is over US$ 140 billion. The United States Air Force was formed in 1947 by the National Security Act and has been deployed in many major conflicts around the world. Besides its combat role, the U.S. Air Force is also a major contributor to relief and aid operations around the world. The United States Air Force has its headquarters at the Pentagon in Virginia.