Hoonah Seaplane Base (FAA LID: OOH) is a state-owned public-use seaplane base located in Hoonah, Alaska.
 It is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a "general aviation" facility.
Cape Town International Airport (IATA: CPT, ICAO: FACT) is the primary airport serving the city of Cape Town, and is the second-busiest airport in South Africa and third-busiest in Africa.
 Located approximately 20 km from the city centre, the airport was opened in 1954 to replace Cape Town's previous airport, Wingfield Aerodrome.
 Cape Town International Airport is the only airport in the Cape Town metropolitan area that offers scheduled passenger services.
 The airport has domestic and international terminals, linked by a common central terminal.
Will Rogers World Airport (IATA: OKC, ICAO: KOKC, FAA LID: OKC) , a.k.a. Will Rogers Airport or simply Will Rogers, is an American passenger airport in Oklahoma City located about 6 miles (8 km) Southwest of downtown.
 It is a civil-military airport on 8,081 acres of land (3,270 ha) and is the primary commercial airport of the state.
 Although the official IATA and ICAO airport codes for Will Rogers World Airport are OKC and KOKC, it is common practice to refer to it as "WRWA" or "Will Rogers".
A fixed-base operator (FBO) is an organization granted the right by an airport to operate at the airport and provide aeronautical services such as fueling, hangaring, tie-down and parking, aircraft rental, aircraft maintenance, flight instruction, and similar services.
 In common practice, an FBO is the primary provider of support services to general aviation operators at a public-use airport and is located either on airport leasehold property or, in rare cases, adjacent to airport leasehold property as a "through the fence operation".
 In many smaller airports serving general aviation in remote or modest communities, the town itself may provide fuel services and operate a basic FBO facility.
 Most FBOs doing business at airports of high to moderate traffic volume are non-governmental organizations, i.e. either privately or publicly held companies.
Hoonah Airport (IATA: HNH, ICAO: PAOH, FAA LID: HNH) is a state-owned public-use airport located one nautical mile (2 km) southeast of the central business district of Hoonah, Alaska.
Chokurdakh Airport (sometimes written Chokurdah Airport, Cokurdah Airport) (IATA: CKH, ICAO: UESO) is an airport in Yakutia, Russia located 1 km north of Chokurdakh.
 It is a major airfield handling small transport aircraft.
 Google Earth imagery shows a taxiway network on the north side, a feature not common to Russian civilian airports.
AirNav.com is a supplemental resource for pilots and aviation enthusiasts.
 The site publishes aeronautical and airport information released by the Federal Aviation Administration (FAA) such as runway distances, airfield traffic patterns, airport frequencies (common traffic advisory frequency (CTAF), tower, ground, Automatic Terminal Information Service (ATIS)/Automated Weather Observing System (AWOS)/Automated Surface Observing System (ASOS), instrument landing system (ILS), approach and departure, center or ARTCC, clearance delivery, emergency, and Flight Service Station (FSS)/fixed-base operator (FBO) frequencies), airport operations, facilities and services, chart location, navigational coordinates and locations, radio aids, ownership information and other pertinent information that all pilots need when traveling into or out of an airport or around the United States National Airspace System (NAS).
 The same information is published in the Airport/Facility Directory (A/FD), updated every 56 days.
Hammond Northshore Regional Airport (ICAO: KHDC, FAA LID: HDC) is a city-owned, public-use, joint civil-military, general aviation airport located three nautical miles (6 km) northeast of the central business district of Hammond, a city in Tangipahoa Parish, Louisiana, United States.
 The airport was previously an uncontrolled facility utilizing VHF-band UNICOM as a Common Traffic Advisory Frequency (CTAF).
 As a result of the relocation of Army National Guard flight operations from Lakefront Airport to Hammond, a new control tower was constructed at the airport.
 This tower, manned by military air traffic controllers from the Air Operations Department of the Louisiana Army National Guard's Army Aviation Support Facility #1 at the airport, became operational on 15 December 2014.
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.
Macau International Airport (IATA: MFM, ICAO: VMMC) (Portuguese: Aeroporto Internacional de Macau ), is an international airport in the special administrative region of Macau, situated at the eastern end of Taipa island and neighbouring waters which opened for commercial operations on 9 November 1995, during Portuguese administration of the region.
 Since then the airport has been a common transfer point for people traveling between the Mainland and Taiwan, as well as a passenger hub for destinations in mainland China and Southeast Asia.
 During 2006, the airport handled 5 million passengers and 220,000 tonnes of cargo.

Question: What do Aniak Airport and Hoonah Airport have in common?
Answer: airport