Airman 1st Class Brianna Renninger, 386th Expeditionary Logistics Readiness Squadron expeditionary theater distribution center journeyman, tests an M-50 joint service general purpose mask, at a theater distribution center on Ali Al Salem Air Base, Kuwait, Aug. 13, 2019. The masks are tested for marks, scratches and broken seals that would render the mask ineffective in an emergency situation. (U.S. Air Force photo by Staff Sgt. Mozer O. Da Cunha)