U.S. Air Force Staff Sgt. Shaylin Butler stands on top of a humvee. U.S. Air Force Staff Sgt. Shaylin Butler stands on top of a humvee during a break in training for convoy operations during the Phoenix Warrior Course 06-1 at Fort Dix, N.J., on Aug. 8, 2006. Butler is an instructor for the 421st Combat Training Squadron. SHARE: Download: Full Size (0.09 MB) Credit: VIRIN: 430630-R-UTP65-674.jpg Photo Gallery