Staff Sgt. Richard Mills, an observer coach/trainer assigned to 1-410th Brigade Engineer Battalion, 4th Cavalry Multi-Functional Training Brigade, leads an after-action review with a Stryker M1135 Nuclear, Biological and Chemical Reconnaissance Vehicle crew during a gunnery at Fort Hood, Texas, Oct. 28, 2017. The crew, assigned to the Army Reserve's 300th Chemical Company out of Morgantown, W.Va., conducted protection missions in their Stryker and trained on their vehicles weapons systems. (U.S. Army Photo by Sgt. Rakeem Carter/released.)