States after the country and its carriers failed to improve sufficiently following a warning the previous year. The move was driven by the country's lax oversight of its carriers including Korean Air. The rating has since been restored as the airline invested billions of dollars to improve safety, upgrade its fleet, install new technology, and overhaul its corporate culture including hiring consultants from Boeing and Delta Air Lines. In 2002, the New York Times noted that Korean Air had been removed from many "shun lists". Early 21st century On 23 June 2000, along with Aeroméxico, Air France and Delta Air Lines, Korean Air founded world's major airline alliance, SkyTeam and SkyTeam Cargo, founded on 28 September 2000. On June 5, 2007, Korean Air said that it would create a new low-cost carrier called Jin Air in Korea to compete with Korea's KTX high-speed railway network system, which offered cheaper fares and less stringent security procedures compared to air travel. Jin Air started scheduled passenger service on July 17, 2008. Korean Air announced that some of its 737s and A300s would be given to Jin Air. In mid-2010, a co-marketing deal with games company Blizzard Entertainment sent a 747-400 and a 737-900 taking to the skies wrapped in StarCraft II branding. In August 2010, Korean Air announced heavy second-quarter losses despite record-high revenue. In August 2010, Hanjin Group, the parent of KAL, opened a new cargo terminal at Navoi in Uzbekistan, which will become a cargo hub with regular Incheon-Navoi-Milan flights. In 2013, Korean Air acquired a 44% stake in Czech Airlines. It sold the stake in October 2017. On May 1, 2018, the airline launched a joint venture partnership with Delta Air Lines. In 2019, Korean Air began playing a safety video with the K-pop group SuperM. It featured the song "Let's go everywhere", which was to be released as a single. The airline also featured the group on a livery sported by a Boeing 777-300ER, with registration HL8010. Nut rage incident Cho Hyun-Ah, also known as "Heather Cho", is the daughter of then-chairman Cho Yang-ho. She resigned from some of her duties in late 2014 after she ordered a Korean Air jet to return to the gate to allow a flight attendant to be removed from the aircraft. The attendant had served Cho nuts in a bag instead of on a plate. As a result of further fallout, Cho