SEYMOUR JOHNSON AIR FORCE BASE, N.C. -- Staff Sgt. Kennethea Berry simulates chewing gum while performing an M-50 Joint Service General Purpose Mask fit test here May 19, 2010. The M-50 JSGPM is the new standard gas mask being issued across all military branches. Sergeant Berry, 4th Fighter Wing paralegal, hails from Nashville, Tenn. (U.S. Air Force photo/Senior Airman Gino Reyes)
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