Question: Harrisburg International Airport and Tucson International Airport, are which classification of airports?
Sentence (from "Tucson International Airport"): Tucson International Airport (IATA: TUS, ICAO: KTUS, FAA LID: TUS) is a public joint civil-military airport owned by the City of Tucson 8 mi south of downtown Tucson, in Pima County, Arizona.
Relevant evidence: Yes