Air National Guard members from the 144th Airlift Squadron,

Air National Guard members from the 144th Airlift Squadron, Joint Base Elmendorf-Richardson, Alaska, and active-duty members from the 18th Aeromedical Evacuation Squadron, Kadena Air Base, Japan, prepare for simulated evacuation victims during Joint Base Elmendorf-Richardson, , Nov. 5, 2015, at Osan Air Base, Republic of Korea. More than eight squadrons from three separate bases across Pacific Air Forces are participating in Vigilant Ace 16, a large-scale exercise designed to enhance the interoperability of the U.S. and Republic of Korea Air Forces. (U.S. Air Force photo/Staff Sgt. Benjamin Sutton)