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190618-N-ZI635-008 ROTA, Spain (June 18, 2019) Seabees assigned to Naval Mobile Construction Battalion (NMCB) 133 test a lightweight water purification system (LWPS) at Naval Station Rota, Spain. LWPS is a reverse osmosis modular unit that is equipped for small-scale water purification in any field condition. 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)