A U.S. Air Force Airman greases a bolt before replacing the brakes of an AC-130U gunship on the flightline at Hurlburt Field, Fla., Feb. 20, 2013. The 1st Special Operations Aircraft Maintenance Squadron is a special operations force enabler and its mission is to generate combat capability in the form of safe and reliable special mission aircraft. (U.S. Air Force photo/Airman 1st Class Christopher Callaway)