130508-N-SD120-024 OKINAWA, Japan (May 8, 2013) Builder Constructionman Kelvin Chen, from Loveland, Colo., directs Seabees where to place a part of the lightweight water purification system while learning how to assemble the system and how it operates. Naval Mobile Construction Battalion (NMCB) 5 conducted block training evolutions to increase the combat proficiency of the Seabees assigned to the command and to test the equipment used during field operations. NMCB 5 is currently supporting Navy and joint forces throughout the U.S. Pacific Command (PACOM). (U.S. Navy photo by Mass Communication Specialist 1st Class John P. Curtis/Released)