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Tricia Upchurch, Air Mobility Command Museum volunteer educator, gives visiting students and parents a tour of a Curtiss C-47 airplane Oct. 17, 2017, at the Air Mobility Command Museum on Dover Air Force Base, Del. Upchurch, a former high school history teacher, designed and coordinated the tour and activity curriculum for a group of 55 home-schooled students. (U.S. Air Force photo by Mauricio Campino)