Question of the Day for the Picture of the Day – Who can tell us what the big yellow hose going into the aircraft door is for? Comment below.

Airmen assigned to the 379th Expeditionary Aircraft Maintenance Squadron prepare a KC-135 Stratotanker refueling aircraft for a mission in support of Operation Inherent Resolve – US Department of Defense

Watch: Ride along on a KC-135 mission at Exercise Red Flag

Featured image Air Force photo by Staff Sgt. Trevor T. McBride

kc-135 stratotanker