A U.S. Air Force KC-135 Stratotanker crew goes over paperwork with the crew chiefs before starting pre-flight checks, March 10, 2015 at Al Udeid Air Base, Qatar. The KC-135 will refuel coalition F-15s and F-16s supporting Operation Inherent Resolve. (U.S. Air Force photo by Staff Sgt. Perry Aston/RELEASED)
Staff Sgt. Perry Aston
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