JOINT FORCES TRAINING BASE LOS ALAMITOS, Calif. – Marines

JOINT FORCES TRAINING BASE LOS ALAMITOS, Calif. – Marines with the 15th Marine Expeditionary Unit’s Logistics Combat Element wait for the aircrew’s permission to load a casualty into an MV-22B Osprey during a mass casualty drill part of Certification Exercise, June 6, 2017. CERTEX is the last in a series of training exercises, which certifies the MEU capable for deployment in support of fleet and combatant commanders across the full range of military operations. (U.S. Marine Corps photo by Cpl. F. Cordoba)