 
 <prompt> text: ```Read di tori and ansa di kweshons.

Di United States Air Force (USAF) na di aerial warfare service branch of di United States Armed Forces and one of di seven American uniformed services. Initially part of di United States Army, di USAF bin form as a separate branch of di military on 18 September 1947 under di National Security Act of 1947. E be di most recent branch of di U.S. military wey dem form, and e be di largest and one of di world's most technologically advanced air forces. Di USAF dey talk say dem core functions na Nuclear Deterrence Operations, Special Operations, Air Superiority, Global Integrated ISR, Space Superiority, Command and Control, Cyberspace Superiority, Personnel Recovery, Global Precision Attack, Building Partnerships, Rapid Global Mobility and Agile Combat Support.

Di U.S. Air Force na military service wey dey organized inside di Department of the Air Force, one of di three military departments of di Department of Defense. Di Air Force dey headed by di civilian Secretary of the Air Force, wey dey report to di Secretary of Defense, and e dey appointed by di President with Senate confirmation. Di highest-ranking military officer inside di Department of the Air Force na di Chief of Staff of the Air Force, wey dey supervise Air Force units, and e dey serve as member of di Joint Chiefs of Staff. Air Force combat and mobility forces dey assigned, as directed by di Secretary of Defense, to di Combatant Commanders, and neither di Secretary of the Air Force nor di Chief of Staff get operational command authority over dem.

1. Which branch be di air force?
2. Which branch?``` <response>: ```1. US Air Force
2. US Armed Forces``` 