190517-N-ZI635-212 ROTA, Spain (May 17, 2019) Cmdr. Luke Greene transfers the battalion flag to Cmdr. Frank Carroll during Naval Mobile Construction Battalion (NMCB) 133's change of command ceremony on board 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)