Reserve Marines with 1st Battalion, 24th Marines, 25th Marine Regiment, 4th Marine Division, Marine Forces Reserve, provide suppressive machine gun fire for ground units at range 410A during Integrated Training Exercise 4-16, at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., June 14, 2016. ITX 4-16 allows Reserve Marines to train in realistic environments to increase their proficiency and readiness for worldwide deployment. - Reserve Marines with 1st Battalion, 24th Marines, 25th Marine Regiment, 4th Marine Division, Marine Forces Reserve, provide suppressive machine gun fire for ground units at range 410A during Integrated Training Exercise 4-16, at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., June 14, 2016. ITX 4-16 allows Reserve Marines to train in realistic environments to increase their proficiency and readiness for worldwide deployment.