U.S. Army Sgt. Joshua McKinley, assigned to Company

U.S. Army Sgt. Joshua McKinley, assigned to Company A, 1-111th General Aviation Support Battalion, South Carolina Army National Guard, replaces the tail rotor gear box cover on a UH-60 Black Hawk while performing preventative maintenance daily checks during the Vigilant Guard South Carolina exercise, in Georgetown, S.C., March 8, 2015. Vigilant Guard is a series of federally funded disaster-response drills conducted by National Guard units working with federal, state and local emergency management agencies and first responders. (U.S. Army National Guard photo by Sgt. Brian Calhoun/Released)