While listening to instructions of the decontamination team member at this station of decontamination, the Marines of 3D RECON BN, 3D MAR DIV, Okinawa, Japan, pair up into buddy teams and with the M40 Chemical-Biological Field Mask in place, begin to strip each other of their Mission-Oriented Protective Posture response level 4 (MOPP-4) gear. Third Reconnisiance Battalion participated in a training exercise that tests the unit's ability to react during real world Nuclear, Biological, Chemical (NBC) threats