SEATTLE - Coast Guard Cold Water Ice Diving Course trainee, Health Service Technician 2nd Class Roy Mesenscott, is pulled through the egress hole by fellow divers after completing a dive in the frozen Diamond Lake in eastern Wash., Feb. 16, 2011. The course aims to familiarize the divers with the harsh climatic elements of the Polar Regions. U.S. Coast Guard photo by Petty Officer 3rd Class Nathan W. Bradshaw.
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