U.S. Marine Corps Staff Sgt. Michael Riggs provides first aid for a simulated casualty, Sgt. Caleb Messmore, both assigned to 3rd Low Altitude Air Defense Battalion, Camp Pendleton, Calif., while participating in a mobilized operations course during Integrated Training Exercise 2-15 at Marine Corps Air Ground Combat Center Twentynine Palms (MCAGCC), Calif., Feb. 2, 2015. MCAGCC conducts relevant live-fire combined arms training, urban operations, and joint/coalition level integration training that promotes operational forces' readiness. (U.S. Air Force photo by Staff Sgt. Heather Cozad Staley/Released)