Staff Sgt. Aaron Downing secures the area around a Humvee during "battle drills" performed before each mission at Contingency Operating Base Speicher, Iraq. Sergeant Downing performs duties on a Police Transition Team here, and the drills are designed to simulate any possible situation the team may encounter while conducting missions outside the wire. The PTT's goal is to help the Iraqis establish a functioning, independent police force. Sergeant Downing is assigned to the 732nd Expeditionary Security Forces Squadron Det 1. (U.S. Air Force photo/Master Sgt. Steve Horton)