Marines with Alpha Company, 1st Battalion, 8th Marine Regiment fire a 60 mm mortar round during Integrated Training Exercise 1-16 aboard Marine Air Ground Combat Center, Twentynine Palms, Calif., Oct. 26, 2015. During ITX, Marines demonstrate core infantry mission essential tasks while conducting offensive and defensive operations. (U.S. Marine Corps photo by Cpl. Immanuel M. Johnson/Released)