In this Aug. 23, 2011 Defense Video & Imagery Distribution System photo, Staff Sgt. Robert Bales, 1st platoon sergeant, Blackhorse Company, 2nd Battalion, 3rd Infantry Regiment, 3rd Stryker Brigade Combat Team, 2nd Infantry Division participates in an exercise at the National Training Center at Fort Irwin, Calif. A senior U.S. official, Friday March 16, 2012 identified Bales as the man accused of killing 16 civilians in an attack on Afghan villagers five days ago. (AP Photo/DVIDS, Spc. Ryan Hallock)