U.S. Air Force Airman 1st Class Kaden Norwood, 633rd Communication Squadron cable and antenna technician, monitors the gas reader during routine cable checks on Joint Base Langley-Eustis, Virginia, February 8, 2019. Gas readers can help cable and antenna technicians to avoid serious injury or death by measuring the toxic fumes that may develop in these manholes. (U.S. Air Force photo by Airman 1st Class Marcus M. Bullock)