A Marine with 1st Battalion, 8th Marine Regiment pauses as he fires during the sniper marksmanship assessment as part of Integrated Training Exercise 1-16 at Marine Corps 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. - A Marine with 1st Battalion, 8th Marine Regiment pauses as he fires during the sniper marksmanship assessment as part of Integrated Training Exercise 1-16 at Marine Corps 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.