U.S. Marines with Headquarters Company, 6th Marine

U.S. Marines with Headquarters Company, 6th Marine Regiment, 2nd Marine Division (MARDIV), inspect a .50 caliber medium machine gun before conducting a battle sight zero on Marine Corps Air Ground Combat Center Twentynine Palms, Calif., April 30, 2015. 6th Marines and subordinate units participated in Intergrated Training Exercise 3-15 to ensure all elements of Special-Purpose Marine Air Ground Task Force 6 are prepared for upcoming deployments and operational commitments. (U.S. Marine Corps photo by Staff Sgt. Keonaona C. Paulo 2D MARDIV Combat Camera/Released)