Tech. Sgt. Corey Fossbender checks a weapon gun prior to the last combat mission of the MH-53 Pave Low helicopter Sept. 27 in Iraq. The MH-53 is being retired after nearly 40 years of service to the Air Force. Sergeant Fossbender is an MH-53 aerial gunner from the 20th Expeditionary Special Operations Squadron. (U.S. Air Force photo/Staff Sgt. Aaron Allmon)