Master Sgt. Travis Shaffer, 914th Aircraft Maintenance Squadron propulsion specialist prepares to raise the engine of a KC-135R aircraft into position on the wing at Niagara Falls Air Reserve Station, N.Y. on July 7, 2020. Shaffer was part of a team of maintenance professionals installing one of the four main engines on the Stratotanker during the unit’s first engine replacement. (U.S. Air Force photo by Peter Borys)