Chemical Company Soldiers perform self-decontamination procedures during a chemical, biological, radiological and nuclear defense training exercise at the Joint Readiness Training Center on Fort Polk, La., March 15, 2016. The soldiers are assigned to the 21st Chemical Company. Army photo by Spc. Ashley Marble SHARE: Download: Full Size (1.64 MB) Credit: Spc. Ashley Marble VIRIN: 160315-A-AP678-023J.JPG Photo Gallery