A C-17A Globemaster III, from the 729th Airlift Squadron, approaches a KC-135R Stratotanker, from the 336th Air Refueling Squadron May 20, above the clouds during an aerial refueling training mission. Both aircraft are based at March Air Reserve Base. (U.S. Air Force photo by Master Sgt. Rick Sforza)
Technical Sgt. Osvaldo Castro, a boom operator with the 336th Air Refueling Squadron, looks out the boom pod of a KC-135R Stratotanker for the C-17A he will refuel over the Pacific Ocean during a training mission. (U.S. Air Force photo by Master Sgt Rick Sforza)