Air Force Staff Sgt. Marjorie Hoover goes through a decontamination procedure after an attempt to identify radioactive contaminants in a passenger train during a Global Dragon training event in Perry, Ga., March 18, 2015. The training provides a refresher course for airmen, allowing them to identify live chemical, biological, radiological and nuclear agents and materials. Hoover is assigned to the 151st Air Refueling Wing.