Today marks the 65th anniversary of the United States Air Force. Originally part of the United States Army, it was called the Air Service. In 1926, it was renamed as the United States Army Air Corps. The United States Army Air Forces (USAAF) was established in 1941 and the Air Corps was abolished. Despite this, the Army Air Corps remained a branch of the Army throughout WWII until 1947, where The National Security Act of 1947 established the United States Air Force as a separate branch of the military.