A Marine with 1st Battalion, 8th Marine Regiment fires at a target at an unknown distance drill during the sniper marksmanship assessment as part of Integrated Training Exercise 1-16 aboard Marine Air Ground Combat Center, Twentynine Palms, Calif., Oct. 24, 2015. During ITX, Marines demonstrate core infantry mission essential tasks while conducting offensive and defensive stability operations. (U.S. Marine Corps photo by Cpl. Immanuel M. Johnson/Released)