An ambulance waits as a U.S. Army UH-60 Black Hawk

An ambulance waits as a U.S. Army UH-60 Black Hawk prepares to land for a medical evacuation rehearsal at Colonel Ernesto Ravina Air Base, Philippines, April 6, 2019 during Exercise Balikatan. In its 35th iteration, Balikatan is an annual U.S.-Philippine military training exercise focused on a variety of missions, including humanitarian assistance and disaster relief, counter-terrorism, and other combined military operations. Balikatan helps participating forces maintain a high level of readiness and responsiveness and enhances combined military-to-military relations and capabilities. (U.S. Army photo by Spc. Elizabeth Johnson)