U.S. Air Force Staff Sgt. Bryan Costerisan, 444th Air Expeditionary Advisory Squadron, relays the location of an Mi-17 helicopter during a formation flight at Shindand Air Base, Afghanistan, Feb. 7, 2011. Formation flying is part of the tactical flying phase of the Afghan pilot training program at Shindand Air Base. (U.S. Air Force Photo/Staff Sgt. Eric Harris) (RELEASED)