Chief Master Sgt. Tom Kimball says how proud he is to his nephew, Lt. Col. Mark Kimball, a B-1 pilot, the morning before the chief retired, Feb. 17, 2017 at his home outside of Denver, Co. Chief Kimball served more than 24 years in the Air Force. ( Air Force Photo/Tech. Sgt. David Salanitri)

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Keywords: afspc, air, force, kimball, retired, salanitri, space