This might be one of the best A-10 videos ever.
It shows A-10s firing guns and rockets on the Nevada Test and Training Range. The Warthogs belong to the 422nd Test and Evaluation Squadron (422 TES), a unit assigned to the 53nd Test and Evaluation Group, based at Nellis Air Force Base, Nevada.
The A-10s make extensive use of their GAU-8 Avenger, a rotary cannon that is the airplane’s primary armament.
Although it is considered by far, the best Close Air Support platform in the U.S. inventory, the U.S. Air Force is considering phasing out the entire A-10 attack jets fleet because of the budged cuts faced in the last year and the need to pursue existing procurement projects, including the F-35 JSF.