Commandant of the Marine Corps Gen. Joseph F. Dunford, Jr., left, signs a football for Marine Wing Communications Squadron 38 while talking with Lt. Col. Dom D. Ford, right, commanding officer of MWCS-38, during the Marine Expeditionary Force Exercise aboard Marine Corps Air Station Miramar, San Diego, Calif., Feb. 11, 2015. MEFEX is conducted to strengthen interoperability across the Marine Air Ground Task Force.