Pilot tried to warn of Trade Centre crash
There are reports the pilot of one of the planes which crashed into the World Trade Centre was sending messages to air traffic controllers after the hijack.
It has been reported that the pilot of American Airlines flight 11 managed to send radio transmissions from the Boeing 767.
During the final few minutes of the flight, John Ogonowski's voice could hardly be heard but it is clear he was trying to convey the situation.
The pilot was seemingly triggering a talk button on the aircraft's control stick which enables him to steer while communicating.
It also indicates that Mr Ogonowski was in the pilot's seat for much of the journey.
"The button was being pushed intermittently most of the way to New York," an air traffic controller said.
"He wanted us to know something was wrong. When he pushed the button and the terrorist spoke, we knew. There was this voice that was threatening the pilot, and it was clearly threatening."
During the transmissions, the pilot's voice and the heavily-accented voice of a hijacker were clearly audible.
"One of the pilots keyed their mike so the conversation between the pilot and the person in the cockpit could be heard," a controller is quoted as saying.
"The person in the cockpit was speaking in English. He was saying something like, 'Don't do anything foolish. You're not going to get hurt."'
