U.S. Air Force Staff Sgt. Blake Hendricks, 1st Operations Support Squadron aircrew flight equipment technician, uses a ruler and chalk to mark measurements on a parachute at Joint Base Langley-Eustis, Virginia, Dec. 10, 2019. AFE technicians strictly follow Air Force Technical Orders which give detailed step-by-step directions on how to fabricate or repair the equipment they work on. (U.S. Air Force photo by Airman 1st Class Zoie Cox)