180207-N-FT956-2798 DIEGO GARCIA, British Indian Ocean Territory (Feb. 7, 2018) Builder 3rd Class Christopher Higgins assigned to Naval Mobile Construction Battalion (NMCB) 4, uses a level to finish up the 2nd course of the block wall. NMCB-4 is forward deployed to the Pacific, ready to support major combat operations, humanitarian assistance/disaster relief operations and provide general engineering support to Navy, Marine Corps, and joint operational forces. (U.S. Navy photo by Builder 2nd Class Christopher J. Moore/Released)