Keywords: US Navy 100914-N-2515C-097 Sailors raise their arms, signifying that they have successfully donned their MCU-2P gas mask during chemical, biologica.jpg en SAN DIEGO Sept 14 2010 Sailors raise their arms signifying that they have successfully donned their MCU-2P gas mask during chemical biological and radiological CBR training aboard the amphibious transport dock USS Green Bay LPD 20 The CBR training was held in preparation for the upcoming Unit-Level Training Assessment-Certification Ultra-C U S Navy photo by Mass Communication Specialist 1st Class Larry S Carlson/Released 2010-09-14 100914-N-2515C-097 Navy http //www navy mil/view_image asp id 91795 U S Navy photo by Mass Communication Specialist 1st Class Larry S Carlson PD-USGov-Military-Navy Aboard USS Green Bay LPD-20 MCU-2/P Protective Mask |