Steven Decker, right, teaches a group of U.S. Navy SEALs rope techniques during a river-crossing exercise during Northern Edge, a training exercise, on Fort Wainwright, Alaska, June 17, 2009. Decker is an instructor at the Northern Warfare Training Center. Steven Decker, right, teaches a group of U.S. Navy SEALs rope techniques during a river-crossing exercise during Northern Edge, a training exercise, on Fort Wainwright, Alaska, June 17, 2009. Decker is an instructor at the Northern Warfare Training Center. SHARE: Download: Full Size (2.51 MB) Tags: Photo Essays Credit: VIRIN: 832851-U-IVJ40-375.jpg Photo Gallery