Air Force Staff Sgt. Jared M. Thiems, left, shows Airman 1st Class Hayley Prato where the flap pressure gauge is located on a KC- 135 Stratotanker at Al Udeid Air Base, Qatar, April 24, 2017. Thiems and Prato, fuel systems technicians with the 379th Expeditionary Maintenance Squadron are performing of a gravity transfer valve operational check and are responsible for diagnosing and repairing any malfunctions before the aircraft takes flight.

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