The U.S. Air Force is one of the branches of the United States Armed Forces, responsible for aerial and space operations. Established as a separate service in 1947, it focuses on defending the nation through air power, including combat, transport, and reconnaissance missions. The Air Force operates a variety of aircraft, such as fighter jets, bombers, and transport planes, to carry out its missions. It also plays a crucial role in global operations, providing support to ground forces and engaging in humanitarian efforts during disasters.