Military working dog Robby charges a simulated aggressor to protect his handler, Senior Airman William Bailey, during a training session at Camp Taji, Iraq. Airman Bailey is a Joint Expeditionary Tasking Airman from the 732nd Air Expeditionary Group attached to the Army's 1st Calvary Division. (U.S. Air Force photo/Tech. Sgt. Lionel Castellano)