Rear Adm. Michael McAllister (center), commander, 17 Coast Guard District, speaks to a role player during the delivery of medical supplies to a temporary medical treatment facility set up during the Arctic Chinook exercise in Kotzebue, Alaska, Aug. 24, 2016. Arctic Chinook is a joint U.S. Coast Guard and U.S. Northern Command-sponsored exercise that consists of a live field training exercise in a Unified Command structure. U.S. Coast Guard photo by Petty Offfcer 1st Class Bill Colclough.