U.S. Marine Corps Pfc. Joshua Fletcher, left, and Sgt.

U.S. Marine Corps Pfc. Joshua Fletcher, left, and Sgt. Kevin Garrity, right, both Chemical, Biological, Radiological, Nuclear Defense (CBRN) specialists with Headquarters Battalion, 2nd Marine Division, conduct reconnaissance during Dismount Recon Sets Kit and Outfits (DRSKO) training at the Guardian Center in Perry, Ga., Sept. 14, 2018. DRSKO training enhanced CBRN’s capabilities by providing realistic scenarios to test their minds and techniques. (U.S. Marine Corps photo by Cpl. Melanye Martinez)