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![U.S. Marine Corps Sgt. Anton Arajaf, a gunner assigned to 2nd Low Altitude Air Defense Battalion (LAAD), attaches a filter to an M50 joint-service general purpose gas mask before a live fire U.S. Marine Corps Sgt. Anton Arajaf, a gunner assigned to 2nd Low Altitude Air Defense Battalion (LAAD), attaches a filter to an M50 joint-service general purpose gas mask before a live fire](https://c8.alamy.com/comp/P43NBA/us-marine-corps-sgt-anton-arajaf-a-gunner-assigned-to-2nd-low-altitude-air-defense-battalion-laad-attaches-a-filter-to-an-m50-joint-service-general-purpose-gas-mask-before-a-live-fire-exercise-at-marine-corps-base-camp-lejeune-nc-june-8-2016-2nd-laad-conducted-a-live-fire-exercise-to-maintain-proficiency-and-accuracy-with-the-fim-92-stinger-missile-launcher-us-marine-corps-photo-by-lance-cpl-anthony-j-brosilowreleased-P43NBA.jpg)
U.S. Marine Corps Sgt. Anton Arajaf, a gunner assigned to 2nd Low Altitude Air Defense Battalion (LAAD), attaches a filter to an M50 joint-service general purpose gas mask before a live fire
![Navy and Marine Corps to study facial hair's effect on gas masks, lawsuit reveals | Stars and Stripes Navy and Marine Corps to study facial hair's effect on gas masks, lawsuit reveals | Stars and Stripes](https://www.stripes.com/incoming/vhwkoh-260122GAS-MASKSphoto02.jpg/alternates/LANDSCAPE_910/260122GAS-MASKSphoto02.jpg)