U.S. Marine Corps Lance Cpl. Alexander Perez, from left, Lance Cpl. David Rios, and U.S. Navy Hospitalman Sean Sullivan, 1st Tank Battalion, Delta Company, Marine Corps Air Ground Combat Center Twentynine Palms (MCAGCC), Calif., participate in a simulated casualty scenario during Integrated Training Exercise 2-15 at MCAGCC, Feb. 5, 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)