Air Force Lt. Col. Graham Warden, left, commander, 374th Medical Operations Squadron, explains an exercise inject card to emergency response personnel from Kyorin University Hospital during a major accident response exercise at Yokota Air Base, Japan, July 12, 2017. The exercise is an annual training requirement for the base to test its readiness and response capabilities and the first time Japanese emergency response personnel from Kyorin University Hospital and Japan Air Self-Defense Force members participated. Air Force photo by Yasuo Osakabe