Apr 8, 2025

A U.S. Marine Corps chemical, biological, radiological, nuclear (CBRN) specialist assigned to 1st Combat Engineer Battalion, 1st Marine Division, disperses chlorobenzalmalononitrile, or CS gas, during CBRN training at Marine Corps Base Camp Pendleton, California, April 3, 2025. The CBRN training served to increase Marines’ confidence in their equipment and maintain proficiency in operating in a CBRN-contaminated environment. The M-50 field protective mask is designed to provide 24 hours of continuous head-eye-respiration protection against chemical agents, biological agents, radiological particulates, and toxic industrial chemicals. (U.S. Marine Corps photo by Gunnery Sgt. Manuel A. Serrano)

CAMERA

Canon EOS R6

LENS

SAMYANG RF 85mm F1.4

APERTURE

2

SHUTTERSPEED

1/100

ISO

2000

IMAGE IS PUBLIC DOMAIN

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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.

CAMERA

Canon EOS R6

LENS

SAMYANG RF 85mm F1.4

APERTURE

2

SHUTTERSPEED

1/100

ISO

2000

 
I Marine Expeditionary Force