A 455th Expeditionary Aircraft Maintenance Squadron aircraft maintainer adds liquid oxygen to an EC-130 aircraft at Bagram Airfield, Afghanistan, Jan. 2011. The 455th EAMXS is responsible for preparing military aircraft on Bagram for flight and returning them to a mission-ready state once they land. (U.S. Air Force photo/Airman 1st Class Ericka Engblom)

A 455th Expeditionary Aircraft Maintenance Squadron crew works as a team repairing an A-10 Thunderbolt at Bagram Airfield, Afghanistan, April 6, 2012. The 455th EAMXS is responsible for repairing and maintaining military aircraft on Bagram as well as performing preventative maintenance inspections. (U.S. Air Force photo/Airman 1st Class Ericka Engblom)

A 455th Expeditionary Aircraft Maintenance Squadron aircraft maintainer repairs a part on an HH-60 helicopter at Bagram Airfield, Afghanistan, April 27, 2011. The 455th EAMXS is responsible for the maintenance of military aircraft on Bagram. (U.S. Air Force courtesy photo)

Staff Sgt. Glen Vart, 455th Expeditionary Maintenance Squadron Ammunition Supply Point technician, inspects 20 mm rounds to ensure they are serviceable at Bagram Airfield, Afghanistan, March 23, 2011. All ammunition must be inspected before being loaded to avoid deficient-round mishaps. (U.S. Air Force photo by Senior Airman Sheila deVera)