U.S. Air Force Staff Sgt. Dwight Stalter, 435th Security Forces Squadron contingency response team leader, slings his rifle over his shoulder during exercise Frozen Defender in Grostenquin, France, Jan. 14, 2020. Frozen Defender tests the squadron’s capabilities in a contested environment under harsh conditions. The Defenders maintained vigilance as they faced adversarial encounters throughout the exercise. (U.S. Air Force photo by Staff Sgt. Devin Boyer)