The Western Air Defense Sector’s 225th Support Squadron conducts a joint technical inspection of the radios at Mt. Lemmon Defense Program Facility near Tucson, Arizona, Jan. 25, 2024. Rob Thompson, Federal Aviation Administration National Airspace System Defense Programs voice radio communications technical subject matter expert for radio inspections used a portable radio to simulate an aircraft making radio calls to the WADS to check that the communication pathway is functioning properly. (U.S. Air National Guard photo by Bruce Robie)