Annette Painter, an instrument technician specialist and AEDC Fellow, wraps .002 in. wire around a wafer as she demonstrates the making of a Schmidt-Boelter heat flux gauge Jan. 15, 2020, in the Arnold Engineering Development Complex Test Technology, Analysis and Evaluation Branch's Aerothermal Measurements Lab at Arnold Air Force Base, Tenn. (U.S. Air Force photo by Jill Pickett)