English: A U.S. Army Avenger air defense system fires a Stinger missile for a coastal air defense event during Balikatan 23 at the Naval Education, Training and Doctrine Command, Philippines, April 25, 2023. The Avenger air defense system is a self-propelled surface-to-air missile system which provides mobile, short-range air defense protection for ground units against cruise missiles, unmanned aerial vehicles, low-flying fixed-wing aircraft and helicopters. Balikatan 2023 is the 38th iteration of the annual bilateral exercise between the Armed Forces of the Philippines and the U.S. military. The exercise includes three weeks of training focused on amphibious operations, command and control, humanitarian assistance, urban operations and counterterrorism skills throughout northern and western Luzon. Coastal defense training figures prominently in the Balikatan 23 training schedule. (U.S. Marine Corps photo by Cpl. Tyler Andrews)