Question: Are Cyril E. King Airport and Deadhorse Airport both located on US soil?

Context articles: Deadhorse, Alaska
Cyril E. King Airport
Charlotte Amalie West, U.S. Virgin Islands
Savana Island, U.S. Virgin Islands
Prinair Flight 277
Saba Island, United States Virgin Islands
Deadhorse Airport
Soil in the United States
Planosol
Air St. Thomas

Deadhorse is an unincorporated community in North Slope Borough, Alaska, United States, along the North Slope near the Arctic Ocean.
 The town consists mainly of facilities for the workers and companies that operate at the nearby Prudhoe Bay oil fields.
 Deadhorse is accessible via the Dalton Highway from Fairbanks, 495 miles south, or Deadhorse Airport.
 Limited accommodations are also available for tourists.
Cyril E. King International Airport (IATA: STT, ICAO: TIST, FAA LID: STT) is a public airport located two miles (3 km) west of the central business district of Charlotte Amalie on the island of St. Thomas in the United States Virgin Islands.
 It is currently the busiest airport in the United States Virgin Islands, and one of the busiest in the eastern Caribbean, servicing 1,403,000 passengers from July 2015 through June 2016.
 The airport also serves nearby St. John and is often used by those traveling to the British Virgin Islands.
Charlotte Amalie West is a town in St. Thomas, U.S. Virgin Islands on the west side next to the Cyril E. King Airport, is the third largest town in the U.S. Virgin Islands (after Charlotte Amalie and Anna's Retreat).
 As of 2000, the population is 5,146.
Savana Island is an islet of the United States Virgin Islands.
 It is located off the West End of St. Thomas at 18°20'N 65°05'W, approximately 7 miles west of Cyril E. King Airport.
 (See also Minor islands of the United States Virgin Islands).
Prinair Flight 277 was a regular passenger flight by Puerto Rican airline Prinair, between Cyril E. King International Airport in Charlotte Amalie, St. Thomas, United States Virgin Islands and Isla Verde International Airport in Carolina, Puerto Rico, a suburb of San Juan.
 On 5 March 1969, the flight, operated by de Havilland Heron 2D N563PR, crashed into a mountain near Fajardo, killing all 19 occupants on board.
Saba Island is a rocky Caribbean island in the United States Virgin Islands, situated three miles south of the Cyril E. King Airport and 2.6 miles west of Water Island.
 It is a steep, 200 feet high island with a sandy beach on the northern side.
 Turtledove Cay is connected by a shallow sandbar.
 Saba Island has salt ponds on both the eastern and western sides, which is popular bird observation posts, and has numerous rocky cliffs with sea birds on its southern shores.
 The island has the archipelago’s largest colony of sea birds with more than 30,000 Sooty terns.
 Other sea bird species include the Bridled tern, Roseate tern, Brown noddy, Black-crowned night heron, Black-necked stilt, Yellow warbler, as well as the Red-billed- and White-tailed tropicbird.
 Besides for bird observation, the island is visited by scuba divers and snorkelers.
 In addition to coral reefs, the waters here are home to numerous ship wrecks, such as the Witshoal II, Witconcrete II, Grainton, and Witservice IV.
Deadhorse Airport (IATA: SCC, ICAO: PASC, FAA LID: SCC) is a public airport located in Deadhorse on the North Slope of Alaska.
 It can be accessed from Fairbanks via the Elliott and Dalton highways.
 It is near Prudhoe Bay and is sometimes also called Prudhoe Airport.
The US soil taxonomic hierarchy includes orders, suborders, great groups, subgroups, families and series, with each series representing a unique kind of soil.
 In the United States, over 19,000 soil series have been identified.
A planosol in the FAO World Reference Base for Soil Resources is a soil with a light-coloured, coarse-textured, surface horizon that shows signs of periodic water stagnation and abruptly overlies a dense, slowly permeable subsoil with significantly more clay than the surface horizon.
 In the US Soil Classification of 1938 used the name Planosols, whereas its successor, the USDA soil taxonomy, includes most Planosols in the "Great Groups" Albaqualfs, Albaquults and Argialbolls.
Air St. Thomas was an airline based on the island of St. Thomas, in the United States Virgin Islands.
 It operated regular and charter passenger services.
 Its main base was Cyril E. King Airport, St Thomas.
 It ceased operations in December 2005.
 The company, founded in 1975, was banned in March 2004 on the French airports and is since then blacklisted.
 She had only a very small fleet and did not provide long haul routes.