Guatemalan Public Health Services representatives check vaccination cards during a joint Medical Readiness Training Exercise at Jocotán, Chiquimula, Guatemala, April 29, 2016. MEDRETES serve to validate a service member’s ability to provide care under austere conditions in remote locations, and also provide an opportunity for them to work side by side with foreign counterparts while providing much-needed medical care, developing partnerships and long-lasting relationships with other nations. (U.S. Army photo by Maria Pinel)