U.S. Marine Corps photo by Cpl. William Perkins/Released 151213-M-VZ995-007.JPG
Dec 18, 2015
Gunnery Sgt. Apollo Thomas, the Chemical, Biological, Radiological, Nuclear defense chief holds tablets to test the air for harmful chemical agents during a CBRN drill aboard Marine Corps Air Ground Combat Center Twentynine Palms, California, Dec. 13, 2015. The Marines and Sailors with 5th Marine Regiment conducted the gas drill as part of Steel Knight 2016, a division-led exercise which prepares Marines and Sailors with the 1st Marine Division and adjacent I Marine Expeditionary Force units with the skill sets necessary to operate as a fully capable Marine Air Ground Task Force.
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