Question: Raleigh–Durham International Airport, is the main airport serving Raleigh, Durham, and the surrounding Research Triangle region of North Carolina, the airport  is a crew base for which regional airline carrier, owned by Trans States Holdings and is headquartered in Bridgeton, Missouri?
Context: Duke University Medical Center (commonly referred to as Duke University Hospital) is a 938-acute care bed academic tertiary care facility located in Durham, North Carolina.  Since its establishment in 1930, the hospital has grown from a small regional hospital to a world-renowned academic medical center.  Duke University Hospital is the flagship teaching hospital for the Duke University Health System, a network of physicians and hospitals serving Durham County and Wake County, North Carolina, and surrounding areas, as well as one of three Level I referral centers for the Research Triangle of North Carolina (the other two are UNC Hospitals in nearby Chapel Hill and WakeMed Raleigh in Raleigh). The Research Triangle Regional Public Transportation Authority, known as GoTriangle (previously Triangle Transit and Triangle Transit Authority or TTA), provides regional bus service to the Research Triangle region of North Carolina in Wake, Durham, and Orange counties.  The "GoTriangle" name was adopted in 2015 as part of the consolidated GoTransit branding scheme for the Triangle. The Raleigh–Durham Skyhawks were an American football team headquartered in Raleigh, North Carolina that played for one season in 1991 in the World League of American Football (WLAF).  The name was inspired by the Wright brothers' flights on the Outer Banks of North Carolina.  The three jet-trails and three planes in flight, as well as the triangle design in the logo, represented the three points of the Research Triangle area (Raleigh, Durham, and Chapel Hill).  The team's cheerleaders were known as the "Kittyhawks." Trans States Holdings, Inc. is a privately owned holding company for three regional airlines: Compass Airlines, GoJet Airlines and Trans States Airlines.  The holding company is headquartered in Bridgeton, Missouri near the Lambert-St.  Louis International Airport. Morrisville is a town located in both Wake and Durham counties of the U.S. state of North Carolina.  The population was 18,576 at the 2010 census.  The U.S. Census Bureau estimates the town's population to be 21,932 as of July 1, 2013.  Morrisville is part of the Research Triangle metropolitan region.  The regional name originated after the 1959 creation of the Research Triangle Park, located midway between the cities of Raleigh and Durham.  The Research Triangle region encompasses the U.S. Census Bureau's Combined Statistical Area (CSA) of Raleigh-Durham-Cary.  The estimated population of the Raleigh-Durham-Cary CSA was 1,565,223 as of July 1, 2006, with the Raleigh-Cary Metropolitan Statistical Area (MSA) portion estimated at 994,551 residents.  The U.S. headquarters of Chinese multinational Lenovo are located in the municipal limits. GoJet Airlines LLC is a company headquartered in Bridgeton, Missouri, United States.  Wholly owned by Trans States Holdings, it has 1670 employees.  It operates commuter feeder services under the United Express and Delta Connection names.  Go Jet Airlines has crew bases at Lambert-Saint Louis International Airport, O'Hare International Airport, Denver International Airport, and Raleigh-Durham International Airport.  Flights are currently operated out of United's hubs at O'Hare International Airport and Denver International Airport, as well as Lambert-Saint Louis International Airport.  GoJet's Delta Connection flights currently operate out of Lambert-Saint Louis International Airport , Detroit Metropolitan Airport and Raleigh-Durham International Airport.  Its call sign "Lindbergh" is named after aviation pioneer Charles Lindbergh, who flew the "Spirit of St. Louis" solo across the Atlantic Ocean in 1927, the first person to do so. The Research Triangle, commonly referred to as simply The Triangle, is a region in the Piedmont of North Carolina in the United States, anchored by North Carolina State University, Duke University, University of North Carolina at Chapel Hill, and the cities of Raleigh and Durham and the town of Chapel Hill.  The eight-county region, officially named the Raleigh–Durham–Chapel Hill combined statistical area (CSA), comprises the Raleigh and Durham–Chapel Hill metropolitan areas and the Dunn, Henderson, Oxford, and Sanford Micropolitan Statistical Areas.  A 2013 Census estimate put the population at 2,037,430, making it the second largest metropolitan area in the state of North Carolina behind Charlotte.  The Raleigh–Durham television market includes a broader 24-county area which includes Fayetteville, and has a population of 2,726,000 persons. Trans States Airlines, along with Compass Airlines and GoJet Airlines, is owned by Trans States Holdings and is headquartered in Bridgeton, Missouri. Raleigh–Durham International Airport (IATA: RDU, ICAO: KRDU, FAA LID: RDU) is the main airport serving Raleigh, Durham, and the surrounding Research Triangle region of North Carolina.  It is located 4+1/2 mi northeast of the town of Morrisville in Wake County.  The airport covers 5,000 acres (2,000 ha) and has three runways and has passenger service to 41 destinations with 126 average daily departures, including nonstop intercontinental service to London and Paris.  In 2016, RDU set an all-time record for passengers, with 11,049,143 passengers traveling through the airport.  The RDU Airport Authority is in charge of the airport facilities and its operations and is controlled by a board of representatives from the counties of Wake and Durham and the cities of Raleigh and Durham.  The airport is a focus city for Delta Air Lines and is also a crew base for regional carriers Trans States Airlines and GoJet Airlines. The Research Triangle Park (RTP) is one of the largest research parks in the world.  It is named for the three hub cities of Durham, Raleigh, and Chapel Hill, or more properly for the three major research universities in those three cities (Duke University, NC State University, and the University of North Carolina at Chapel Hill respectively).  The Research Triangle region of North Carolina received its name as an extension of the name of the park.  Besides the three anchor cities, the park is also bounded by the communities of Morrisville and Cary and the proposed annexations to the town of Pittsboro would also bring that community into close contact with the RTP.  Approximately one fourth of the park's territory lies in Wake County, but the majority of its land is in Durham County.
Answer: Trans States Airlines