Staff Sgt. Zachariah Kilmer, 36th Civil Engineer Squadron Emergency Management Flight education and training section NCO in charge, demonstrates the proper way to seal mission oriented protective posture gear during chemical, biological, radiological and nuclear training Oct. 1, 2015, at Andersen Air Force Base, Guam. Emergency managers teach a CBRN refresher course once a month to Airmen who are preparing for a permanent change of station or deploying to medium or high-threat level duty stations. (U.S. Air Force photo by Senior Airman Joshua Smoot/Released)