171117-N-GZ832-0097 OKINAWA, Japan (Nov. 17, 2017) Gunnery Sgt. Issac Sato instructs Seabees assigned to Naval Mobile Construction Battalion (NMCB) 4, on tactics training during the unit driven training. NMCB’s are ready to support major combat operations, humanitarian assistance/disaster relief operations, and provide general engineering support to Navy, Marine Corps, and joint operational forces. (U.S. Navy photo by Mass Communications Specialist 2nd Class Benjamin Stevens/Released)