U.S. Air Force Staff Sgt. Estaban Gonawicha, 435th Security Forces Squadron ground combat readiness training center instructor, arrives to Grostenquin, France, with his comrades for exercise Frozen Defender, Jan. 14, 2020. Frozen Defender tests the squadron’s capabilities in a contested environment under harsh conditions. Upon arrival to Grostenquin, Gonawicha and his comrades had to carry their supplies across the terrain while providing security along the way. (U.S. Air Force photo by Staff Sgt. Devin Boyer)