U.S. Marine Corps photo by Lance Cpl. Clare McIntire/Released 180327-M-CD121-0105.JPG
Apr 3, 2018
Cpl. Ashten Derickson, a cyber network operator with 3rd Marine Aircraft Wing, dons an M50 Joint Service General Purpose Mask during the reconnaissance, surveillance and decontamination course at Marine Corps Air Station Miramar, Calif., March 25. The course is designed to train unit personnel in the procedures and equipment used in accomplishing RS&D operations in a chemical, biological, radiological or nuclear environment. (U.S. Marine Corps photo by Lance Cpl. Clare J. McIntire)
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