A Marine and corpsman with the 11th Marine Expeditionary Unit transport a role player acting as an injured patient as part of a mass casualty training exercise during Certification Exercise (CERTEX) at Camp Pendleton, California, June 15, 2014. CERTEX is the final evaluation of the 11th MEU and Makin Island Amphibious Ready Group prior to deployment. The evaluation requires the Marines and sailors to plan and conduct integrated missions simulated to reflect real-world operations. (U.S. Marine Corps photo by Lance Cpl. Laura Y. Raga/Released)