180313-F-YK359-1161 Soldiers assigned to 3rd Battalion, 21st Infantry Regiment provide overwatch during a deployment of Stryker armored vehicles as part of the U.S. Army Alaska-led Arctic Edge 2018 exercise held at Eielson Air Force Base, Alaska, March 13, 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 extreme cold-weather conditions found in arctic environments Air Force photo by Airman 1st Class Isaac Johnson SHARE IMAGE: Download Image: Full Size (2.45 MB) Photo By: Airman Isaac Johnson VIRIN: 180313-F-YK359-1161.JPG Photo Gallery