ANDREWS AIR FORCE BASE, Md. -- Staff Sgt. Daniel Fazio, 11th Civil Engineer Squadron firefighter, performs a mask fit test on Chief Master Sgt Anthony Brinkley, 11th Wing/Joint Base Andrews command chief, before Chief Brinkley’s live fire training at Joint Base Andrews Nov. 17. The fit test is made up of eight breathing tests performed in a mask to ensure proper seal and size. (U.S. Air Force photo by Senior Airman Melissa V. Brownstein)