171227-N-N0818-0003 YOKOSUKA, Japan (Dec. 27, 2017) Seabees assigned to Naval Mobile Construction Battalion (NMCB) 4, install insulation and roofing on the Pre-Engineered Building (PEB). 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 Steelworker 2nd Class Jeffery S. Boerma/Released)