MARINE CORPS AIR STATION YUMA, Ariz. -- U.S. Navy Corpsman HM2 Max Sechler, Marine Corps Air Station Yuma Search and Rescue, demonstrates an IV lab for U.S. Marines following Combat Lifesaver (CLS) Course at MCAS Yuma Ariz., May 14, 2019. The CLS Course is a two-week long evaluation that teaches service members how to properly apply life-saving medical treatmemt to injured service members in any environment (U.S. Marine Corps photo by Lance Cpl. Joel Soriano)