aircraft. Piedmont was acquired by USAir in 1989; USAir was renamed US Airways in 1997, and merged with American Airlines in 2013. In addition to flights to its main regional hub at Charlotte Douglas International Airport, US Airways introduced three daily flights between Wilmington and La Guardia Airport in New York City during the 2000s following lobbying from the Wilmington community. US Airways also introduced nonstop service to Ronald Reagan Washington National Airport in March 2011. American Eagle began service between Wilmington and Chicago O'Hare International Airport in July 2011 after the airport authority offered two years of waived fees and marketing cost sharing. This route had been actively sought by the local business community for its connections to the West Coast and to Asia. The route was discontinued on April 2, 2012, but reinstated in early 2018. ILM was one of four airports along the East Coast which served as an emergency abort landing site for the Space Shuttle. Improvements in the orbiter's braking system reduced the previous runway requirement to enabling ILM's 8,016-foot (2,443 m) runway to serve the role. ILM has also been used for touch-and-go training flights by United States Air Force VIP aircraft, including the Boeing VC-25 (Air Force One), C-32 and C-40. Superfund site A burn pit on the airport property was named a Superfund site on March 31, 1989. The burn pit was built in 1968 and was used until 1979 for firefighter training missions. Jet fuel, gasoline, petroleum storage tank bottoms, fuel oil, kerosene, and sorbent materials from oil spill cleanups were burned in the pit. Up to 500 gallons of fuel and other chemicals were used during each firefighting training exercise. The firefighters in the training missions mainly used water to put out the fires, but carbon dioxide and other dry chemicals were also used. The soil and groundwater was found to have multiple contaminants, including benzene, ethylbenzene, total xylene, 2-methylnaphthalene, phenanthrene, chloroform, 1,2-dichloroethane, and chromium. The site has finished environmental remediation, and the last five-year review for the site was completed in August 2013. According to the EPA the site has been delisted from the national priority list. Accidents and incidents On September 24, 1961, a USAF Fairchild C-123 Provider with 15 occupants aboard, including six skydivers, stalled and crashed after takeoff during an air show. There were three fatalities. On August 22, 1962, a Piedmont Airlines Martin 4-0-4 swerved