A-10 Warthog

Warthogs first saw combat during the 1991 Gulf War, where it flew with a mission capable rate of 95.7%.

Although the A-10's principal weapon is its cannon, the plane is also typically equipped with AGM-65 Maverick air-to-surface missiles. It may also carry cluster bombs or Hydra rocket pods.

The A-10 Thunderbolt II, endearingly referred to as the Warthog for its snubbed-nose design, is set for retirement in the 2015 budget as deep cuts to military funding will go into effect.

This planned retirement is deeply unpopular. The Warthog has a tried and true track record of providing close air support to ground troops. Critics of the retirement maintain that the Air Force is simply trying to retire the plane to make way for more exciting, but unproven, future aircraft like the F-35.

The Air Force says it has no choice but to retire the aging plane. It expects that retiring the total fleet of A-10s by 2020 will save an estimated $3.7 billion.