171222-N-N0818-0001 YOKOSUKA, Japan (Dec. 22, 2017) Steelworker 2nd Class Erik Grassauer assigned to Naval Mobile Construction Battalion (NMCB) 4, checks blueprints prior to drilling the concrete wall. The holes are for anchor bolts to secure the garage door trim that will be installed on Pre-Engineered Building (PEB) project. 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)