160121-N-KR961-016 PACIFIC OCEAN (Jan. 21, 2016) Chief Warrant Officer Sean Roberts, air boatswain, instructs Sailors assigned to Air Department during an aircraft fire drill in the hangar bay of amphibious assault ship USS Boxer (LHD 4). Boxer is currently underway conducting routine training exercises and maintenance in preparation for its upcoming deployment. (U. S. Navy photo by Mass Communication Specialist 2nd Class Debra Daco/Released)