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Imagery taken by MARFORRES COMMSTRAT

Chief Warrant Officer 2 Lucas Sheehan, a counter intelligence and human intelligence officer with Special Purpose Marine Air-Ground Task Force - Southern Command breaks the seal of an M50 gas mask with his fingers during gas chamber training at Marine Corps Base Camp Lejeune, North Carolina, March 16, 2020. Training for chemical, biological, radiological, nuclear defense defense is an event in which Marines and Sailors are exposed to CS gas in order to familiarize themselves with the use of a gas mask. Marines and Sailors with SPMAGTF-SC are conducting a variety of pre-deployment training events and qualifications in order to enhance crisis response preparedness in and around Latin America and the Caribbean. These events assist the Marines and Sailors with providing security cooperation training and engineering projects alongside partner nation military forces in Central and South America. Sheehan is a native of Murrysville, Pennsylvania. (U.S. Marine Corps photo by Sgt. Andy O. Martinez)

200316-M-MI258-1039

U.S. Marine Corps photo by Sgt. Andy Martinez/Released 200316-M-MI258-1039.JPG

May 21, 2020

Chief Warrant Officer 2 Lucas Sheehan, a counter intelligence and human intelligence officer with Special Purpose Marine Air-Ground Task Force - Southern Command breaks the seal of an M50 gas mask with his fingers during gas chamber training at Marine Corps Base Camp Lejeune, North Carolina, March 16, 2020. Training for chemical, biological, radiological, nuclear defense defense is an event in which Marines and Sailors are exposed to CS gas in order to familiarize themselves with the use of a gas mask. Marines and Sailors with SPMAGTF-SC are conducting a variety of pre-deployment training events and qualifications in order to enhance crisis response preparedness in and around Latin America and the Caribbean. These events assist the Marines and Sailors with providing security cooperation training and engineering projects alongside partner nation military forces in Central and South America. Sheehan is a native of Murrysville, Pennsylvania. (U.S. Marine Corps photo by Sgt. Andy O. Martinez)

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CAMERA

ILCE-7M3

LENS

DT 24-70mm F2.8 SAM

APERTURE

28/10

SHUTTERSPEED

1/100

ISO

800

IMAGE IS PUBLIC DOMAIN

This photograph is considered public domain and has been cleared for release. If you would like to republish please give the photographer appropriate credit. Further, any commercial or non-commercial use of this photograph or any other DoD image must be made in compliance with guidance found at https://www.dimoc.mil/resources/limitations, which pertains to intellectual property restrictions (e.g., copyright and trademark, including the use of official emblems, insignia, names and slogans), warnings regarding use of images of identifiable personnel, appearance of endorsement, and related matters.