U.S. Army Pfc. William Rivera, from the Puerto Rico Army National Guard, standing, provides guidance to two El Salvador Army soldiers while they treat a wounded soldier during a practical exercise on combat lifesaver skills 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.