U.S. Air Force Chief Master Sgt. Kennon Arnold, 633rd Air Base Wing vice command chief, participates in the 633rd ABW change of command ceremony at Joint Base Langley-Eustis, Va., June 22, 2017. Col. Sean Tyler assumed command of the unit, which provides installation support to more than 18,000 Airmen, Soldiers and civilians across two major command headquarters, 13 operational wings and Army brigades, and more than 20 associate units. (U.S. Air Force photo/Staff Sgt. Areca T. Bell)