Investigators have tonight found the black-box data recorder from the hijacked plane which crashed in a field in Pennsylvania.
The recorder, which could hold crucial evidence of the last minutes before it crashed, is the first to be recovered from the three crash sites.
It was found in the crater caused by the impact of the plane plunging into a field in Shanksville, Pennsylvania, killing all 45 on board, CNNreported.
The hunt is still under way for the voice data recorder, which will allow investigators to hear what the hijackers said for at least 30 minutes before the crash.
The data recorder is on its way to Washington DC where it will be examined by experts to reconstruct the last minutes in the air.
The find came as firefighters working in the remains of the shattered wing of the Pentagon said they were hopeful of finding the black box from the plane which crashed there.
PA