Air Force Reserve Staff Sgt. Michael Richardson, an aircrew flight equipment specialist assigned to the 913th Operations Support Squadron, sprays a simulated 5 percent chlorine solution on Staff Sgt. Michael Hopson, a loadmaster with the 327th Airlift Squadron, in an aircrew contamination control area at Little Rock Air Force Base, Ark., June 19, 2017. Air Force photo by Master Sgt. Jeff Walston