U.S. Army Gen. Frank J. Grass, chief of the National Guard Bureau and a member of the Joint Chiefs of Staff, shakes hands with soldiers from the 781st Joint Task Force Battalion during Vigilant Guard South Carolina at the Choppee Recreation Complex in Georgetown, S.C., March 9, 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. Air National Guard photo by Airman 1st Class Ashleigh S. Pavelek/Released)