Lance Cpl. Robert Gready, an ammunition technician, and Lance Cpl. Ernest Houser, a Marine anti-tank missileman, with Weapons Company, 1st Battalion, 23rd Marine Regiment, 4th Marine Division, calculate the route distance to range 410A, a platoon reinforced attack range, during Integrated Training Exercise 4-18 at Marine Corps Air Ground Combat Center Twentynine Palms, California, June 11, 2018. ITX 4-18 provides MAGTF elements an opportunity to undergo a service-level assessment of core competencies that are essential to expeditionary, forward-deployed operations. (U.S. Marine Corps photo by Lance Cpl. Samantha Schwoch/released)