Lt. Col. Eric Wilks and Lt. Col. Marvin Ashbaker, pilots with the 465th Air Refueling Squadron, conduct pre-flight checks aboard the Air Force Reserve Command’s first KC-135 to be upgraded with Block 45 May 5, 2016, at Tinker Air Force Base, Okla. The $910 million dollar modification program has upgraded 29 aircraft to date. ( Air Force photo/Tech. Sgt. Lauren Gleason)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 45, 507, af, arw, block, kc-135, reserve