Question: Are both Bangor International Airport and MidAmerica St. Louis Airport located in the United States?
Sentence (from "Bangor International Airport"): Bangor International Airport (IATA: BGR, ICAO: KBGR, FAA LID: BGR) is a joint civil-military public airport on the west side of the city of Bangor, in Penobscot County, Maine, United States.
Relevant evidence: Yes