Lt. Gen. Richard T. Tryon (center), the commanding general of U.S. Marine Corps Forces Command and U.S. Marine Forces Europe, speaks with Lt. Col. Matthew A. Dumenigo (left), the commanding officer of Combat Logistics Battalion 24, 2nd Marine Logistics Group, during a Defense Support of Civil Authorities, or DSCA, training exercise, aboard Naval Amphibious Base Little Creek, Va., Aug. 21, 2013. The battalion practiced DSCA operations during a three-day exercise in preparation for possible humanitarian missions during natural disasters.