U.S. Marine Corps Sgt. Winston Barnett, block

U.S. Marine Corps Sgt. Winston Barnett, block noncommissioned officer, Headquarters and Support Battalion, Marine Corps Installations West observes Marines on the firing line at Wilcox Range, Marine Corps Base Camp Pendleton, California, July 26, 2018. A block noncommissioned officer is required to supervise all aspects of training within his assigned block of targets, enforce range and safety regulations, and authorizes alibis as needed. (U.S. Marine Corps photo by Cpl. Juan C. Bustos)