MISAWA AIR BASE, Japan -- Airman 1st Class Estefania Ruvalcaba, 35th Medical Operations Squadron mental health technician, attaches an adapter to the drinking tube of a new M-50 Joint Service General Purpose Mask in the 35th Logistics Readiness Squadron supply warehouse Nov. 3. Airman Ruvalcaba tested how well the mask fit Staff Sgt. Diane Foster by measuring how many outside smoke particles were able to enter the mask. (U.S. Air Force photo/Staff Sgt. Samuel Morse)
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