U.S. Marines with Alpha Battery, 2nd LAAD Battalion fires a stinger training launch simulator during a range as part of exercise Arctic Edge on Fort Greely, Alaska, on Mar. 14, 2018. Arctic Edge 2018 is a biennial, large-scale, joint-training exercise that prepares and tests the U.S. military’s ability to operate tactically in the extreme cold-weather conditions found in Arctic environments. (U.S. Marine Corps photo by Lance Cpl. Cody J. Ohira)