A U.S. Air Force MH-53 Pave Low helicopter sits on the tarmac.
A U.S. Air Force MH-53 Pave Low helicopter from the 20th Expeditionary Special Operations Squadron sits on the tarmac prior to a final combat mission at Joint Base Balad, Iraq, on Sept. 27, 2008. The Pave Low is being retired after nearly forty years of service to the Air Force.