PETALUMA, Calif. -- Petty Officer 1st Class Luke Potter, a marine science technician, and Petty Officer 1st Class Brian Atkison, an electrician's mate, sample unknown contents from a drum during a hazardous material exercise conducted by the Pacific Strike Team at Coast Guard Training Center Petaluma March 17, 2008. The Pacific Strike Team is one of three special teams that make up the Coast Guard's National Strike Force. The Novato, Calif., based team is recognized worldwide as an expert authority in the preparation and response to the effects resulting from oil discharges, hazardous substance releases, weapons of mass destruction events and other emergencies on behalf of the American public. (U.S. Coast Guard photo by Petty Officer 3rd Class Melissa Hauck)