Sgt. Raymond S. Perry, a chemical, biological, radiological, and nuclear (CBRN) defense specialist with the 13th Marine Expeditionary Unit, scans a window for radiation with his multirae detector during Tacticle Site Exploitation (TSE) training, Feb. 06, 2018, Camp Pendleton, California. The TSE training was conducted to increase the Marines' skills in a CBRN threat environment to prepare them for future deployments. ( Marine Corps

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