U.S. Air Force Airman Jordan Vignon, 362nd Training Squadron, 1st Detachment technical student, performs maintenance on a UH-60 Pave Hawk tail gear box during training at Fort Eustis, Va., Feb. 28, 2013. Approximately 115 Airmen come through the detachment doors annually to become skilled crew chiefs of the H-60 helicopters. (U.S. Air Force photo by Staff Sgt. Ashley Hawkins/Released)