U.S. Marine Corps photo by Lance Cpl. Levi Schultz/Released 150827-M-PS017-521.JPG
Sep 3, 2015
Cpl. Tristofer Ducharme, operator, Unmanned Aerial Vehicle Squadron 1, removes his M50 joint service general purpose mask during annual training in the confidence chamber at Range 105, Aug. 27, 2015. While inside the chamber the Marines are required to perform exercises to ensure the mask is properly sealed.
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