DC-3 built followed seven DSTs off the production line and was delivered to American Airlines. American Airlines inaugurated passenger service on June 26, 1936, with simultaneous flights from Newark, New Jersey, and Chicago, Illinois. American also had a direct role in the development of the DC-10, which resulted from a specification from American Airlines to manufacturers in 1966 to offer a widebody aircraft that was smaller than the Boeing 747, but capable of flying similar long-range routes from airports with shorter runways. McDonnell Douglas responded with the DC-10 trijet shortly after the two companies' merger. On February 19, 1968, the president of American Airlines, George A. Spater, and James S. McDonnell of McDonnell Douglas announced American's intention to acquire the DC-10. American Airlines ordered 25 DC-10s in its first order. The DC-10 made its first flight on August 29, 1970, and received its type certificate from the FAA on July 29, 1971. On August 5, 1971, the DC-10 entered commercial service with American Airlines on a round trip flight between Los Angeles and Chicago. In 2011, due to a downturn in the airline industry, American Airlines' parent company AMR Corporation filed for bankruptcy protection. In 2013, American Airlines merged with US Airways but kept the American Airlines name, as it was the better-recognized brand internationally; the combination of the two airlines resulted in the creation of the largest airline in the United States, and ultimately the world. Destinations and hubs Destinations As of July 2022, American Airlines flies to 269 domestic destinations and 81 international destinations in 48 countries (as of January 2022) in five continents. Hubs American currently operates ten hubs. Charlotte – American's hub for the southeastern United States and secondary Caribbean gateway. Its operations in Concourse E are the largest regional flight operation in the world. American has about 91% of the market share at CLT, making it the largest carrier at the airport. Former US Airways hub. Chicago–O'Hare – American's hub for the Midwest. American has about 35% of the market share at O'Hare, making it the airport's second largest airline after United. Dallas/Fort Worth – American's hub for the southern United States and largest hub overall. American currently has about 87% of the market share at DFW, making it the largest carrier at the airport. American's corporate headquarters are also in Fort Worth near the airport. DFW serves as American's primary Transpacific hub, primary gateway