Iraqi national policeman observe closely as U.S. Army Sgt. Richard Allums (not shown) a mechanic of F Company, 2nd Battalion, 505th Parachute Infantry Regiment, 3rd Brigade Combat Team, 82nd Airborne Division, explains the mechanical systems of a Humvee during Humvee familiarization training at Joint Security Station Beladiyat, in Muhallah 732, Beladiyat, eastern Baghdad, Iraq, on Jan. 5, 2009.