U.S. Air Force Tech. Sgt. David Hunt, 312th Training Squadron Special Instruments Training course instructor, explains different scientific concepts with a student-built plasma chamber, at the Louis F. Garland Department of Defense Fire Academy on Goodfellow Air Force Base, Texas, Aug. 5, 2020. Hunter demonstrated to the SPINSTRA students how volumetric pressure may affect electrons’ flow. (U.S. Air Force photo by Airman 1st Class Abbey Rieves)