Question: Are both Modesto City–County Airport and St. Mary's Airport located in the United States?
Sentence (from "Modesto City–County Airport"): Modesto City–County Airport (IATA: MOD, ICAO: KMOD, FAA LID: MOD) (Harry Sham Field) is two miles (3 km) southeast of Modesto in Stanislaus County, California, USA.
Relevant evidence: Yes