Tech. Sgt. Thomas Cyphers, a 22nd Civil Engineer Squadron emergency management training NCOIC, demonstrates how to assemble a gas mask during a survival skills training class in building 9, Jan. 26, 2010, at McConnell Air Force Base, Kan. EM instructors prepare Airmen for deployments by teaching them essential response skills for a potential chemical and biological attack. (U.S. Air Force photo/Staff Sgt. Anthony Mejia)
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