Question: Piedmont Triad International Airport and Aniak Airport, are located in which country?

Context paragraphs:
WJMH: WJMH, ""102 JAMZ,"" is a mainstream urban-leaning rhythmic contemporary FM radio station serving the Piedmont Triad region, with a hip hop-intense playlist.  It broadcasts at 102.1 MHz with 99,000 watts of power and is licensed to Reidsville, North Carolina.  Owned by Entercom, the station's studios are located near the Piedmont Triad International Airport in Greensboro, with a transmitter site near Stokesdale, North Carolina.

Piedmont Triad International Airport: Piedmont Triad International Airport (IATA: GSO, ICAO: KGSO, FAA LID: GSO) (commonly referred to as "PTI") is an airport located in the center of North Carolina just west of Greensboro, serving Greensboro, High Point and Winston-Salem as well as the entire Piedmont Triad region in North Carolina.  The airport, located just off Bryan Boulevard, sits on a 3,560 acre (1,441 ha) campus and has 3 runways.  Piedmont Triad International airport is the third busiest airport in North Carolina averaging 280 takeoffs and landings each day.  PTI is owned and operated by the Piedmont Triad Airport Authority.

WEAL: WEAL ("Big WEAL") is a gospel radio station in Greensboro, North Carolina targeting African Americans.  It is located at 1510 and broadcasts only during daylight hours allowing "clear channel" station WLAC in Nashville, Tennessee to cover the southern portion of the Atlantic coast.  Owned by Entercom, the station's studios are located near Piedmont Triad International Airport in Greensboro, and a transmitter site is located downtown.

Piedmont Triad: The Piedmont-Triad (or simply the Triad) is a north-central region of the U.S. state of North Carolina that consists of the area within and surrounding the three major cities of Greensboro, Winston-Salem, and High Point.  This close group or "triad" of cities lies in the Piedmont geographical region of the United States and forms the basis of the Greensboro-Winston-Salem-High Point CSA.  The area of the triad is approximately 5,954 square miles.  The metropolitan area is connected by Interstates 40, 85, 73, and 74 and is served by the Piedmont Triad International Airport.  Long known as one of the primary manufacturing and transportation hubs of the southeastern United States, the Triad is also an important educational and cultural region and occupies a prominent place in the history of the American Civil Rights Movement.  The Triad is not to be confused with the "Triangle" region (Raleigh-Durham-Chapel Hill), directly to the east.  As of 2012, the Piedmont Triad has an estimated population of 1,611,243 making it the 33rd largest CSA metropolitan area in the United States.

Aniak Airport: Aniak Airport (IATA: ANI, ICAO: PANI, FAA LID: ANI) is a state owned, public use airport located in Aniak, a city in the Bethel Census Area of the U.S. state of Alaska.  Its location on the Kuskokwim River also allows for the landing of seaplanes.

WPAW: WOLF ("93.1 the Wolf") is a country music radio station licensed to Winston-Salem, North Carolina, and serving the Piedmont Triad region, which includes Greensboro and High Point.  The Entercom outlet broadcasts at 93.1 MHz with an ERP of 100 kW.  The station's studios are located near the Piedmont Triad International Airport, and a transmitter site is near Stokesdale, North Carolina.  On December 28th 2016 , WPAW Switched to WOLF Callsign.

TIMCO: TIMCO Aviation Services, Inc. (TIMCO) provides fully integrated aircraft MRO (Maintenance, Repair and Overhaul) and interiors services for commercial and government aircraft operators.  The company's MRO services include complete airframe MRO for Boeing and Airbus fleets at TIMCO’s corporate complex in Greensboro, North Carolina near Piedmont Triad International Airport (GSO) as well as at facilities in Macon, Georgia and Lake City, Florida.  The company also provides regional jet MRO at its dedicated facility at the Cincinnati Northern Kentucky International Airport (CVG) in Cincinnati, Ohio.

Flagship Airlines Flight 3379: Flagship Airlines Flight 3379 was a scheduled American Eagle flight from Piedmont Triad International Airport to Raleigh-Durham Airport which crashed while executing a missed approach to the Raleigh-Durham airport the evening of Tuesday, December 13, 1994.  The two pilots and 13 passengers died in the crash, five passengers survived.

WQMG: WQMG is an Urban Adult Contemporary station licensed to Greensboro, North Carolina and serves the Piedmont Triad region, which also includes High Point and Winston-Salem.  The Entercom outlet broadcasts at 97.1 MHz with an ERP of 100 kW.  The station's studios are located near the Piedmont Triad International Airport, and a transmitter site is in unincorporated south Guilford County.

Bryan Boulevard: Joseph M. Bryan Boulevard (often signed as just Bryan Blvd) is a limited-access corridor connecting North Carolina Highway 68 with Benjamin Parkway in Greensboro, North Carolina.  Segments of this road are now Interstate 73.  The four-lane highway serves as the main entrance for Piedmont Triad International Airport and was once named "Airport Parkway".  A construction project in 2006 relocated a segment of Bryan Boulevard to make room for the airport's new FedEx hub and third runway; flyover ramps for the airport's entrances and exits have been the most recent additions to Bryan Blvd.

Supporting paragraphs: Piedmont Triad International Airport Aniak Airport
Answer: U.S.