GOODFELLOW AIR FORCE BASE, Texas – Airman 1st Class Onnie O. McSpadden, 127th Michigan Air National Guard firefighting apprentice, readies his gas mask in preparation for firefighting training, Feb. 3. The air becomes thick with smoke and heat around the simulated burners, requiring the students to use oxygen tanks to breathe. (U.S. Air Force photo/ Senior Airman Scott Jackson)