Varig Varig's subsidiaries: After two unsuccessful attempts to auction the airline as a whole, the bankruptcy court decided to split the airline in two different judicial entities, informally known as "old" Varig and "new" Varig: Since , the former "Viação Aérea Rio-Grandense S/A" was judicially known as "Nordeste Linhas Aéreas S/A", and operated under the brand-name Flex Linhas Aéreas. On 18 August 2009, the National Civil Aviation Agency of Brazil renewed the authorization of Flex to operate non-regular passenger, cargo and postal services. Therefore, Flex operated flights on behalf of other airlines, as contracted. Between 17 June 2005 and 2 September
American Airlines Flight 77 had already crashed into the North Tower of the World Trade Center and Flight 175 was known to have been hijacked and was within minutes of striking the South Tower. After learning of this second hijacking involving an American Airlines aircraft and the hijacking involving United Airlines, American Airlines' executive vice president Gerard Arpey ordered a nationwide ground stop for the airline. The Indianapolis Air Traffic Control Center, as well as American Airlines dispatchers, made several failed attempts to contact the aircraft. At the time the airplane was hijacked, it was flying over an area of limited radar coverage. With