Newly posted audio files depict the horror of 9/11 unfolding in the sky, as air traffic controllers struggled to follow the faint tracks of hijacked planes, fighter jets tried in vain to chase them down and a flight attendant made a desperate appeal for help.
Newly posted audio files depict the horror of 9/11 unfolding in the sky, as air traffic controllers struggled to follow the faint tracks of hijacked planes, fighter jets tried in vain to chase them down and a flight attendant made a desperate appeal for help.
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