A C-17A Globemaster III aircraft from the 729th Airlift Squadron refuels from a KC-135R Stratotanker aircraft with the 336th Air Refueling Squadron during an aerial refueling training mission July 7, 2009, over Lake Havasu in Arizona.
Both squadrons are part of the 452nd Air Mobility Wing out of March Air Reserve Base, Calif. (DoD photo by Master Sgt. Rick Sforza, U.S. Air Force/Released). Original public domain image from Flickr