Cpl. Phillip M. Tuente (left) and Pvt. Alec M. Dugan (right), mortarmen with Weapons Company, 1st Battalion, 24th Marine Regiment, 4th Marine Division, Marine Forces Reserve, prepare to fire a M252 mortar during Exercise Arctic Eagle at Camp Grayling, Mich., April 24, 2015. A crew of five enlisted Marines operates and maintains each mortar on the firing line. (U.S. Marine Corps photo by Cpl. Ian Leones/Released)