Lanterns have been lit at the field in Shanksville, Pennsylvania, where hijacked United Airlines flight 93 crashed on September 11, 2001. Former Presidents George W Bush and Bill Clinton paid tribute to the 40 passengers and crew who died on the doomed flight - ahead of the 10th anniversary of the Al Qaeda terrorist attacks on the United States. The jet crashed as air travellers tackled the hijackers after hearing about the dramatic events in New York and Washington. ... http://www.euronews.net/