Army Spc. Nathan Penwell checks equipment inside his M1126 Stryker combat vehicle during training at the Joint Readiness Training Center in Fort Polk, La., July 17, 2016. Penwell is a driver assigned to the Pennsylvania Army National Guard’s Company A, 1st Battalion, 112th Stryker Brigade Combat Team. Army National Guard photo by Sgt. Maj. Corine Lombardo