U.S. Air Force Airman 1st Class Kyle Guthrie, 7th Component Maintenance Squadron B-1B Lancer avionics back shop technician, installs a travelling wave tube into a transmitter at Dyess Air Force base, Texas, Feb. 13, 2019. The TWT sends radio frequency signals to the antenna of a B-1B Lancer. (U.S. Air Force photo by Airman 1st Class Susan Roberts)