Chief Master Sgt. Michael Doelling retires

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U.S. Air Force Retired Col. Dean Robinson presents a Certificate of Appreciation from President Barack Obama to Chief Master Sgt. Michael Doelling during a retirement ceremony on Jan. 09, 2016, Barksdale Air Force Base, La. Doelling is retiring from the Air Force after 30 years of service. (U.S. Air Force photo by Master Sgt. Laura Siebert /Released)