Lance Cpl. Zackary W. Rippin, infantry assaultman, 3rd Battalion, 5th Marine Regiment, operates a weaponized Multi-Utility Tactical Transport vehicle (MUTT) during a company assault on Range 400 at Marine Corps Air Ground Combat Center, Twentynine Palms, California, Nov. 7, 2016, as part of Integrated Training Exercise 1-17. The 28-day exercise is currently the longest-lasting activity that occurs at the installation and involves a series of progressive live-fire exercises that assesses the ability and adaptability of a force of more than 3,500 Marines and sailors. Commandant of the Marine Corps, Gen. Robert B. Neller has designated the battalion as the Marine Corps’ experimental force. - Lance Cpl. Zackary W. Rippin, infantry assaultman, 3rd Battalion, 5th Marine Regiment, operates a weaponized Multi-Utility Tactical Transport vehicle (MUTT) during a company assault on Range 400 at Marine Corps Air Ground Combat Center, Twentynine Palms, California, Nov. 7, 2016, as part of Integrated Training Exercise 1-17. The 28-day exercise is currently the longest-lasting activity that occurs at the installation and involves a series of progressive live-fire exercises that assesses the ability and adaptability of a force of more than 3,500 Marines and sailors. Commandant of the Marine Corps, Gen. Robert B. Neller has designated the battalion as the Marine Corps’ experimental force.