Participants of Exercise Vigilant Shield 2017, Yellowknife, Northwest Territories, pose for a group photo Oct. 21, 2016. During this exercise, forces supporting North American Aerospace Defense Command (NORAD) will deploy and conduct air sovereignty operations in the far north and the high Arctic demonstrating the ability to detect, identify and meet possible threats in some of the most remote regions in the world. (U.S. Air National Guard photo by Senior Master Sgt. Shelly Davison, 142nd Fighter Wing Public Affairs)
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