A-10 Thunderbolt II from the 422d Test and Evaluation Squadron (422 TES) drops guided weapons and fires GAU-8 30mm gun during a training sortie at Nevada Test and Training Range. Weapons used: Guided Bomb Unit-12s (GBU-12), Guided Bomb Unit-38s (GBU-38), Guided Bomb Unit-31s (GBU-31).