Steven Decker teaches a group of Navy SEALs rope techniques June 17 during a river crossing exercise at Fort Wainwright, Alaska, during Northern Edge 2009. Northern Edge is a large-scale exercise hosted in Alaska to improve command, control and communications between the Armed Services. Mr. Decker is an instructor at the Northern Warfare Training Center. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)
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