U.S. Air Force Senior Airman Michael Johnson, center, with the 379th Expeditionary Aircraft Maintenance Squadron, 746th Expeditionary Aircraft Maintenance Unit, positions a C-130 Hercules aircraft engine onto an engine stand as Staff Sgt. Andrew McConkay, a heavy equipment operator with the 557th Rapid Expeditionary Deployable Heavy Operational Repair Squadron, looks on in Southwest Asia Dec. 11, 2013.