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190517-N-ZI635-212 ROTA, Spain (May 17, 2019) Cmdr. Luke Greene, left, transfers the battalion flag to Cmdr. Frank Carroll during the Naval Mobile Construction Battalion (NMCB) 133 change of command ceremony at Naval Station Rota, Spain. Carroll relieved Greene as commanding officer of NMCB-133. NMCB-133 is forward deployed to execute construction, humanitarian and foreign assistance, and theater security cooperation in the U.S. 6th Fleet area of operations. (U.S. Navy photo by Mass Communication Specialist 2nd Class George M. Bell/Released)