Medical personnel apply a dressing to a simulated injury on a volunteer role player during Arctic Chinook, in Kotzebue, Alaska, Aug. 24, 2016. Arctic Chinook is a joint U. S. Coast Guard and U. S. Northern Command-sponsored full-size exercise that consists of a live field training exercise in a Unified Command structure. U.S. Coast Guard photo by Petty Officer 3rd Class Meredith Manning