U.S. Marine Corps 2nd Lt. Sean Harper, platoon commander,

U.S. Marine Corps 2nd Lt. Sean Harper, platoon commander, blue platoon, combined anti-armor team, Bravo Company, 1st Battalion, 7th Marine Regiment, gives introductions prior to a live fire rifle and machine gun range during Exercise Valiant Mark 2016 at Marine Corps Air-Ground Combat Center Twentynine Palms, Calif. Sept. 27, 2016. Valiant Mark is an annual exercise conducted by U.S. Marines and the Singapore Armed Forces in order to maintain a high level of interoperability, enhanced military to military relations and to enrich mutual combat capabilities through combined training. (U.S. Marine Corps photo by Cpl. Akeel Austin/Released)