U.S. Army Spc. Juan Acaron, a combat medic with the Puerto Rico Army National Guard, kneeling, demonstrates combat casualty care techniques to soldiers of the El Salvador Army during CENTAM Guardian 22 in Chalatenango, El Salvador on May 4, 2022. CENTAM Guardian is an annual multinational exercise designed to build humanitarian assistance/disaster response capacities and promote cooperation and interoperability between participating forces. This year, the participating nations include El Salvador as the host country, Honduras, Guatemala and the United States.