Keywords: US Navy 030425-N-6914M-003 Marines attached to Marine Support Service Group (MSSG) decontaminate during a simulated chemical or biological hazard.jpg en Santa Rita Guam Apr 25 2003 -- Marines attached to Marine Support Service Group MSSG decontaminate during a simulated chemical or biological hazard exposure on Guam as part of Operation Tandem Thrust 2003 Tandem Thrust is a joint military exercise being held in the northern Marianas Islands with forces from the United States Canada and Australia U S Navy photo by Photographer's Mate 3rd Class Shawn M Morrison RELEASED 2003-04-25 030425-N-6914M-003 Navy http //www navy mil/view_image asp id 7141 U S Navy photo by Photographer's Mate 3rd Class Shawn M Morrison PD-USGov-Military-Navy Naval Base Guam Tandem Thrust 2003 Gas masks of the United States |