Decontamination Op A soldier assigned to the 308th Chemical Company, 450th Chemical Battalion, 209th Regional Support Group, 76th Operational Response Command sprays water on a "contaminated" Black Hawk helicopter during a decontamination operation at Fort McCoy, Wis., Aug. 20, 2019. SHARE: Download: Full Size (4.01 MB) Credit: Army Sgt. 1st Class Brent C. Powell VIRIN: 190820-A-BQ341-462.JPG Photo Gallery