U.S. Air Force Tech. Sgt. David Hunt, 312th Training Squadron Special Instruments Training course instructor, fires up the plasma chamber, a visual teaching aid, for the SPINSTA students at the Louis F Garland Department of Defense Fire Academy on Goodfellow Air Force Base, Texas, Aug. 5, 2020. The plasma chamber was designed to demonstrate a variety of scientific, electronic and safety principles in a 10:1 student to instructor classroom ratio. (U.S. Air Force photo by Airman 1st Class Abbey Rieves)