Previously unseen footage of the 9/11 terrorist attacks filmed from a police helicopter flying above the burning World Trade Centre has emerged almost ten years on after the terrorist atrocity.
The New York Police Department air and sea rescue helicopter was dispatched to see whether any survivors could be rescued from the rooftops.
But as can be heard, the rescue crew quickly realised the enormity of the situation below.
One officer is heard yelling: “Holy crap, they knocked the whole fricking thing down.”
And another officer asks: “How could it go down?”
The video was handed over by city agencies to the National Institute of Standards and Technology, the federal agency that investigated the collapse. It was released by NIST on 3 March under a Freedom of Information Act.