Keywords: US Navy 100806-N-4440L-042 Seabees don their chemical, biological, radiological gear during a mission oriented protective posture (MOPP) level 4 drill.jpg en GULFPORT Miss Aug 6 2010 Seabees assigned to Naval Mobile Construction Battalion NMCB 74 don their chemical biological radiological CBR gear during a mission oriented protective posture MOPP level 4 drill NMCB-74 is conducting the drill as a part of a readiness exercise designed to build strength confidence and endurance to prepare the battalion for future missions and exercises in homeport and on deployment U S Navy photo by Mass Communication Specialist 2nd Class Michael Lindsey/Released a 2010-08-06 100806-N-4440L-042 Navy http //www navy mil/view_image asp id 90422 U S Navy photo by Mass Communication Specialist 2nd Class Michael Lindsey PD-USGov-Military-Navy Images from US Navy location Gulfport Miss Mission Oriented Protective Posture People wearing gas masks M40 Field Protective Mask |