Sgt. 1st Class James Dunn, a motor transport operator with 3rd Expeditionary Sustainment Command, ground guides a Heavy Expanded Mobility Tactical Truck (HEMTT) assigned to Special Purpose Marine Air-Ground Task Force at an operataions center in Hempstead, Texas Sept. 1, 2017. The Department of Defense is conducting Defense Support of Civil Authorities operations in response to the effects of Hurricane Harvey. DSCA operations are part of the DOD's response capability to assist civilian responders in saving lives, relieving human suffering and mitigating property damage in response to a catastrophic disaster. (U.S. Army photo by: Sgt. Jazmin Jenkins / 22nd Mobile Public Affairs Detachment)