The A-10 Thunderbolt II is the primary ground support aircraft in active service with the United States Air Force. Specifically designed for close air support, its combination of large and varied ordnance load, long loiter time, accurate weapons delivery, austere field capability, and survivability has proven invaluable to the United States and its allies. It has excellent maneuverability at low air speeds and altitude, its wide combat radius and short takeoff and landing capability permit operations in and out of locations near front lines.