The US Air Force is an elite military branch of the United States Armed Forces, responsible for aerial warfare and defense. Synonyms for the US Air Force include the USAF, the Air Force, the Aero Corps, the Aerial Service, the Flying Service, and the Luftwaffe. These terms are used to describe the same organization, which has a long and storied history of air supremacy and excellence in technology and innovation. The US Air Force is a highly respected institution, and its pilots, engineers, and support staff are recognized worldwide for their skill and professionalism.