The United States Air Force (USAF) is the aerial warfare service branch of the United States Armed Forces and one of the American uniformed services. Initially part of the United States Army, the USAF was formed as a separate branch of the military on September 18, 1947 under the National Security Act of 1947. It is the most recent branch of the U.S. military to be formed. The USAF articulates its core functions in its 2010 Posture Statement as 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.

As of 2009 the USAF operates 5,573 manned aircraft in service (3,990 USAF; 1,213 Air National Guard; and 370 Air Force Reserve); approximately 180 unmanned combat air vehicles, 2,130 air-launched cruise missiles, and 450 intercontinental ballistic missiles. The USAF has 330,159 personnel on active duty, 68,872 in the Selected and Individual Ready Reserves, and 94,753 in the Air National Guard as of September 2008. In addition, the USAF employs 151,360 civilian personnel, and has over 60,000 auxiliary members in the Civil Air Patrol, making it the largest air force in the world.

The Department of the Air Force is headed by the civilian Secretary of the Air Force who oversees all administrative and policy affairs. The Department of the Air Force is a division of the Department of Defense, headed by the Secretary of Defense. The highest ranking military officer in the Department of the Air Force is the Chief of Staff of the Air Force.

Department of the Air Force
United States Air Force
Active September 18, 1947 - Present
Country United States of America
Branch Air Force
Size 329,638 active personnel
68,872 reserve personnel
94,597 air guard personnel
5,573 aircraft, of which 2,132 are fighters
450 ICBMs
32 satellites
Part of Department of Defense
Headquarters The Pentagon
Motto "Aim High ... Fly-Fight-Win'also '"Above All" and "No One Comes Close"
Colors Ultramarine Blue & Yellow
March The U.S. Air Force
Engagements Korean War
Vietnam War
Gulf War
Bosnian War
Kosovo Campaign
Afghanistan War
Iraq War
Commanders
Secretary Hon. Michael B. Donley
Chief of Staff Gen Norton A. Schwartz
Vice Chief of Staff Gen Philip M. Breedlove
Chief Master Sergeant CMSAF James A. Roy
Insignia
United States Air Force Symbol USAF logo.png
USAF "Hap" Arnold Symbol Us army air corps shield.svg
Roundel Roundel of the USAF.svg
USAF Pipe Band Tartan Usaf mitchell tartan.jpg
Aircraft flown
Attack A-10, AC-130
Bomber B-52H, B-1B, B-2
Electronic
warfare
E-3, E-8, EC-130
Fighter F-15C, F-15E, F-16, F-22
Helicopter UH-1N, HH-60
Reconnaissance U-2, RC-135, RQ-4, RQ-1
Trainer T-6, T-38, T-1, TG-10
Transport C-130, C-135, KC-135, C-5, C-9, KC-10, C-17, VC-25, C-32, CV-22, C-37, C-21, C-12, C-40.

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