160708-N-DH124-170 OKINAWA, Japan (July 8, 2016) - Cmdr. James Cho salutes Commander, 30th Naval Construction Regiment, Capt. Jeffrey Killian, official taking charge as commanding officer of Naval Mobile Construction Battalion (NMCB) 4 on Camp Shields in Okinawa, Japan, Jul. 8. Cho transferred from Naval Facilities Engineering Command (NAVFAC) Southwest, serving as the Public Works Officer at Naval Base San Diego. (U.S. Navy photo by Mass Communication Specialist 1st Class Rosalie Chang/Released)