Marines look over the hill tops at their targets as the sun sets at Marine Corps Base Camp Pendleton, California, Jan. 13, 2016. The Marines are a mix of Joint Tactical Attack Controllers and Joint Fire Observers who are responsible for directing fires of artillery and aircraft. The Marines are with 1st Air Naval Gunfire Liaison Company, I Marine Expeditionary Force. - Marines look over the hill tops at their targets as the sun sets at Marine Corps Base Camp Pendleton, California, Jan. 13, 2016. The Marines are a mix of Joint Tactical Attack Controllers and Joint Fire Observers who are responsible for directing fires of artillery and aircraft. The Marines are with 1st Air Naval Gunfire Liaison Company, I Marine Expeditionary Force.