Cpl. Brandon Smith, left, instructs a Marine on how to properly clear and seal an M50 Joint Service General Purpose Mask while wearing Mission Oriented Protective Posture gear at Naval Station Guantanamo Bay, Cuba, April 9, 2017. The Marines received classes on the proper application of MOPP gear to protect them from chemical, biological, radiological, and nuclear agents. Smith is a CBRN defense specialist with Headquarters Battalion, 2nd Marine Division. ( Marine Corps Photo by Pfc. Taylor W. Cooper)

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Keywords: 2nd, 3/2, cbrn, division, gitmo, iimef, infantry, marine, training