160411-N-NO181-291 CAMP COVINGTON, GUAM (Apr. 11, 2016) – Construction Mechanic 3rd Class Kyle Gogle, Construction Mechanic Constructionman Joseph Sellers, and Construction Mechanic Constructionman Benjamin Reese, assigned to Naval Mobile Construction Battalion (NMCB) 4, prime a low pressure pump as part of an operational test on the Lightweight Water Purification System. This ensures that assets are available for deployment to Humanitarian Assistants/Disaster Relief missions. As the ready battalion, NMCB 4 will be called as first responders to assist in the Pacific theatre during a time of crisis. (U.S. Navy photo by Construction Mechanic 1st Class Anthony Burris/Released)