'Air force was ordered to shoot down stray jets'
US Vice-President Dick Cheney has admitted that he and President George W Bush ordered the air force to shoot down any passenger jets that were being used in attacks against US landmarks.
Mr Cheney said that on Tuesday, after the first two planes had smashed into the World Trade Centre in New York, fighter jets were ordered to shoot down any plane that failed to respond to orders to divert.
This admission follows confusion over the fourth hijacked plane, which crashed near Pittsburg before it could reach its target.
The US Government has denied that the plane was shot down.
