A Marine breaks the seal of his M50 joint service general purpose mask during a training exercise inside the confidence chamber at Marine Corps Air Station Miramar, Calif., Jan. 19, 2012. Marines break the seal of their protective masks to reseal and clear them, showing they can forcefully expel contaminated air. ( Marine Corps photo by Pfc. Christopher Johns/Released) A Marine breaks the seal of his M50 joint service general purpose mask during a training exercise inside the confidence chamber at Marine Corps Air Station Miramar, Calif., Jan. 19, 2012 120119-M-OB827-011

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Size: 1936px × 1291px
Photo credit: © PJF Military Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: armed, conflict, forces, general, joint, m50, mask, military, purpose, service, states, united, usmc, war