DILI, Timor Leste (October 5, 2017) - Construction Mechanic 3rd Class David Velasco, assigned to Naval Mobile Construction Battalion (NMCB) 4, tests welding equipment during the battalion turnover to ensure readiness and safety of the equipment. NMCB 4 is the forward deployed pacific NMCB 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 Utilitiesman 3rd Class Vanessa Wilson/Released)