Charlie Jansen, a decontamination instructor, walks Fairchild Airmen through what they will be doing for the decontamination training exercise Sept. 16, 2016, at Fairchild Air Force Base, Wash. The Air Force contracts instructors to come and teach bases biannually making sure that Airmen have the best training possible. (U.S. Air Force photo/Airman 1st Class Sean Campbell)