180301-N-RD456-0890 CAMP COVINGTON, Guam (Mar. 01, 2018) Construction Mechanic Constructionman Alan Sargent assigned to Naval Mobile Construction Battalion (NMCB) 4 performs maintenance on a wheel hub of a Medium Tactical Vehicle Replacement (MTVR). 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 Construction Mechanic 2nd Class Jeremy Colbert)