A U.S. Marine Corps rifleman with Alpha Company, 1st Battalion, 8th Marine Regiment, 2nd Marine Division, fires rounds at an enemy as his fire team prepares to push towards their next objective in a mechanized assault course during Integrated Training Exercise 1-16 aboard Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Oct. 30, 2015. Marines participate in a month-long field exercise demonstrating core mission essential tasks by conducting offensive, defensive and stability operations using combined arms, air integration, and battalion-level infantry tactics in order to strengthen operational readiness as they prepare for world-wide deployment. - A U.S. Marine Corps rifleman with Alpha Company, 1st Battalion, 8th Marine Regiment, 2nd Marine Division, fires rounds at an enemy as his fire team prepares to push towards their next objective in a mechanized assault course during Integrated Training Exercise 1-16 aboard Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Oct. 30, 2015. Marines participate in a month-long field exercise demonstrating core mission essential tasks by conducting offensive, defensive and stability operations using combined arms, air integration, and battalion-level infantry tactics in order to strengthen operational readiness as they prepare for world-wide deployment.