BARBED BARRIER U.S. Army Staff Sgt. Milton Johnson crawls on his back beneath barbed wire on the conditioning course during the Marchon Challenge, a battalion-wide competition on Camp Atterbury, Ind., Oct. 18-19, 2008. Johnson, a trainer assigned to 2nd Training Support Battalion, 338th Transportation Regiment, 205th Infantry Brigade, 1st Army East, also is a member of the Indiana National Guard. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 748424-Z-HMN71-266.jpg Photo Gallery