U.S. Marine Lance Cpl. Elijah DeCastro, a tank crewman with A Company, 4th Tank Battalion, 4th Marine Division, walks in front of an M1A1 Abrams main battle tank at Range 500 during Integrated Training Exercise 4-19 at Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., June 9, 2019. Today’s Marine Reserve is a critical component of the Marine Corps’ Total Force, and training like ITX helps ensure Reserve units combat effectiveness and proficiency for world-wide deployment. (U.S. Marine Corps photo by Lance Cpl. Preston L. Morris)