U.S. Marine Corps Sgt. Andrew Gabriel, scout sniper,

U.S. Marine Corps Sgt. Andrew Gabriel, scout sniper, 1st Battalion, 7th Marines, adjusts the scout sniper day scope during a known distance rifle range as part of Exercise Valiant Mark 2016 at Marine Corps Air-Ground Combat Center Twentynine Palms, Calif. Oct. 1, 2016. This is the 25th year that U.S. Marines and the Singapore Armed Forces have met for Valiant Mark, which improves and maintains a high level of interoperability, enhanced military to military relations and to enriches mutual combat capabilities through combined training. (U.S. Marine Corps photo by Cpl. Akeel Austin)