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Tech. Sgt. Michael Stahl, a refueling boom operator assigned to the 18th Air Refueling Squadron, 931st Air Refueling Group, McConnell Air Force Base, Kan., peers out the porthole of a KC-135 Stratotanker during an air refueling training mission, July 14, 2012. Refueling boom operators like Stahl work in the boom pod located in the rear of the KC-135 and control the refueling boom that connects to the receiver aircraft during air refueling. (U.S. Air Force photo by 1st Lt. Zach Anderson)