137th ARW KC-135 refuels 138 FW F-16
An F-16 Fighting Falcon from the 138th Fighter Wing, Tulsa Air National Guard, is refueled by a KC-135 from the 185th Air Refueling Squadron, 137th Air Refueling Wing, from Tinker Air Force Base during a training mission, May 4, 2015. (U.S. Air National Guard photo by Master Sgt. Mark A. Moore/Released)

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Photo by: Master Sgt. Mark A. Moore |  VIRIN: 150504-Z-BI488-119.JPG