Question: Both Tri-State Airport and Rochester International Airport are located in which country?
Context: Owen Roberts International Airport (IATA: GCM, ICAO: MWCR) is an airport located in Grand Cayman, Cayman Islands.  It is the main international airport for the Cayman Islands as well as the main base for Cayman Airways.  The airport is named after British Royal Air Force (RAF) Wing Commander Owen Roberts, a pioneer of commercial aviation in the country, and is one of the two entrance ports to the Cayman Islands.  Owen Roberts International Airport was the only international airport remaining in the Caribbean to have an open-air observation "waving gallery" until January 2017 when it was closed due to reconstruction.  The new upgraded Owen Roberts International Airport terminal will no longer have an observation "waving gallery". New York State Route 252A (NY 252A) was an east–west state highway located within the town of Chili in Monroe County, New York, in the United States.  The western terminus of the route was at an intersection with NY 33A and NY 386 in the hamlet of Chili Center.  Its eastern terminus was at a junction with NY 383 near the Greater Rochester International Airport.  NY 252A was known as Paul Road and was a 4.40 mi alternate route of NY 252 through Chili; however, it did not directly connect to NY 252. Mae Fah Luang - Chiang Rai International Airport (Thai: ท่าอากาศยานแม่ฟ้าหลวง เชียงราย ) (old name: Chiang Rai International Airport (Thai: ท่าอากาศยานเชียงราย)) (IATA: CEI, ICAO: VTCT) is located in the city of Chiang Rai in northern Thailand.  The airport is about 8 km from the city center.  Since 1998 it has been managed by the Airports of Thailand Public Company Limited (AOT).  In 2013 the airport handled over 1,000,000 passengers and 7,000 passenger flights.  The airport has international flight facilities and serves 3 international routes to Hong Kong International Airport , Kunming Changshui International Airport and Haikou Meilan International airport.  In 2014, Airports of Thailand said that they would expand Chiang Rai airport.The plans include to build an additional taxiway, more shops and maybe extend the runaway.This should be completed in 2030. New York State Route 204 (NY 204) is an east–west state highway located just southwest of Rochester in Monroe County, New York, in the United States.  The western terminus of the route is at exit 6 on Interstate 490 (I-490) in Gates.  Its eastern terminus is at I-390 exit 18.  The western portion of NY 204 is a limited-access highway known as the Airport Expressway that indirectly connects I-490 to the Greater Rochester International Airport.  The remaining part of the connection is made via the at-grade portion of NY 204 on Chili (NY 33A) and Brooks Avenues.  NY 204 was assigned c. 1965 going from I-490 to the Rochester city line in Gates, however the section between I-390 and the city line was removed by January 2017. Rochester International Airport (IATA: RST, ICAO: KRST, FAA LID: RST) is a nonhub primary airport located seven miles (11 km) southwest of the central business district of Rochester, a city in Olmsted County, Minnesota, United States.  It is the second busiest airport in Minnesota, however it is the third busiest airport for commercial airlines in Minnesota, behind Duluth International Airport .  It used to be called "Rochester Municipal Airport", which was its name before adding customs and immigration facilities specifically for Mayo Clinic purposes in 1995. Duluth International Airport (IATA: DLH, ICAO: KDLH, FAA LID: DLH) is a city-owned, public-use joint civil-military airport located five nautical miles (9 km) northwest of the central business district of Duluth, a city in Saint Louis County, Minnesota, United States.  It serves the Twin Ports area, including Superior, Wisconsin.  Mostly used for general aviation but also served by three airlines, it is Minnesota's third-busiest airport, behind Minneapolis–St. Paul International Airport (MSP) and Rochester International Airport; and the state's second-busiest commercial passenger airport, after MSP. Northern California TRACON (NCT) (Terminal Radar Approach Control), or NorCal TRACON for short, is an air traffic control facility that provides safety alerts, separation, and sequencing of air traffic arriving, departing, and transiting the airspace and airports in Northern California.  Located in Rancho Cordova near Sacramento, NCT controls airspace over 19000 square miles, and serves Reno International Airport, Sacramento International Airport, San Jose International Airport, Oakland International Airport, and San Francisco International Airport, plus 19 other smaller airports with air traffic control towers.  NCT is the 3rd busiest TRACON in America.  NorCal TRACON is the step between local control (in an airport's control tower) and Air Route Traffic Control Center (ARTCC), in this case, Oakland Center (ICAO code: ZOA).  San Francisco International Airport is the 2nd largest airport in California and the largest airport serving Northern California. Greater Rochester International Airport (IATA: ROC, ICAO: KROC, FAA LID: ROC) is three miles (6 km) southwest of downtown Rochester, in Monroe County, New York.  It is owned and operated by Monroe County.  The largest airline that serves the airport is Delta Air Lines with 30% of passengers flying on Delta.  The airport is home to the 642nd Aviation Support Battalion, part of the 42nd Infantry Division.  It is the fourth-busiest airport in the state of New York and the second-busiest outside of the New York City metropolitan area. Piarco International Airport (IATA: POS, ICAO: TTPP) , and frequently shortened to Piarco International, Piarco Airport, or simply Piarco; is an international airport serving the island of Trinidad and is one of two international airports in Trinidad and Tobago.  The airport is located 30 km east of Downtown Port of Spain, located in the adjacent town of Piarco.  It is the seventh busiest airport in the Caribbean in terms of passengers served and third busiest in the English-speaking Caribbean, after Sangster International Airport and Lynden Pindling International Airport.  The airport is also the primary hub and operating base for the country's national airline, as well as the Caribbean's largest airline, Caribbean Airlines. Tri-State Airport (IATA: HTS, ICAO: KHTS, FAA LID: HTS) , also known as Milton J. Ferguson Field, is a public airport in Wayne County, West Virginia, three miles south of Huntington, West Virginia, near Ceredo and Kenova.  Owned by the Tri-State Airport Authority, it serves Huntington, Ashland, Kentucky, and Ironton, Ohio.  It has heavy use for general aviation, and after the withdrawal of Delta Air Lines in June 2012, is down to two airlines, one of which provides nationwide connecting service.
Answer: United States