Lt. Col. Eric Wilks (left) and Lt. Col. Marvin Ashbaker, pilots with the 465th Air Refueling Squadron at Tinker Air Force Base, Oklahoma, conduct pre-flight checks aboard the Air Force Reserve Command's first KC-135 Stratotanker to receive the Block 45 upgrade. The upgrade provides a digital display of engine controls, an updated autopilot, a new altimeter and software improvements, all of which will help ensure the KC-135 can perform well into the future as the workhorse of the air refueling fleet. (Tech. Sgt. Lauren Gleason)
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