U.S. Air Force Senior Airman Judith Bulkley, an electrical and environmental systems specialist deployed from the 23rd Aircraft Maintenance Squadron, Moody Air Force Base, Ga., exits an A-10C Thunderbolt II after performing an external power operations check on the aircraft at Kandahar Airfield, Afghanistan. Because service members in particular are often exposed to high noise levels, hearing protection is crucial, especially with a TBI. (U.S. Air Force photo by Tech. Sgt. Stephen Schester)