U.S. Air Force medical personnel perform initial triage on a simulated patient during a mass casualty exercise at an undisclosed location in Southwest Asia, Dec. 23, 2015. Canadian forces, U.S. airmen, soldiers, and U.S. Marines and Navy corpsmen assigned to Special Purpose Marine Air Ground Task Force – Crisis Response – Central Command, participated in the joint exercise to hone medical response capabilities. U.S. Marine Corps Photo by Sgt. Rick Hurtado