U.S. Army Sgt. Thomas Roberts, 181st Hazard Response

U.S. Army Sgt. Thomas Roberts, 181st Hazard Response Company, 2nd Chemical Battalion, 48th Chemical Brigade, runs tests at a chemical lab inside a training village for a confirm or deny mission during a situational training exercise (STX) at the Yakima Training Center, Yakima, Wash., April 28, 2017. The final days of the CBRNE Leaders Course are comprised of STX lanes that test what the Soldiers' learned throughout the duration of the course. (U.S. Army photo by Sgt. Kalie Jones)