The US Air Force, often abbreviated as USAF, is the aerial branch of the armed forces of the United States. Its mission is to defend the United States through control of air, space and cyberspace.

The USAF is the largest and most technologically advanced air forces in the world with 5,778 aircraft in service, about 156 drones, cruise missiles 2130 and 450 intercontinental ballistic missiles. The USAF has 330,000 men and women on active duty, 74 000 people in the reserve and 105,708 in the Air National Guard. Moreover, this army employs 168,900 civilians, including indirect employment of foreign nationals.
In terms of the nuclear force, the Air Force has 450 Minuteman III ICBM missiles on permanent alert.
For many years, the use of UCAV and recognition is steadily increasing. In 2008, the USAF announced the commissioning of a first squadron equipped only service of this type of gear. The US Air Force has also trained 350 operators drones in 2011, against 250 traditional combat pilots.
The power of the USAF lies not only in its combat aircraft like its McDonnell Douglas F-15 Eagle or Lockheed Martin F-22 Raptor, but also largely in other aircraft which multiply and increase the hit potential, such as tanker aircraft Boeing KC-135 Stratotanker, and like the AWACS Boeing E-3 Sentry that enable fighter aircraft to strike far and accurately.