It's a heart-breaking bird's eye view of New York's worst tragedy.
Nearly 10 years after the 9/11 attacks, a shocking and powerful 17-minute video taken by an NYPD helicopter on that fateful day surfaced Monday on the web.
Obtained by the National Institute of Standards and Technology and leaked to the web, it shows the chopper flying close to and above the Twin Towers engulfed in clouds of smoke - and the stunned reactions of the cops when they suddenly collapse.
"The whole tower, it's gone," one officer is heard yelling. "Holy crap, they knocked the whole fricking thing down."
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http://www.nydailynews.com/ny_local/2011/03/07/2011-03-07_haunting_911_video_by_nypd_surfaces.html#ixzz1FwCHdJjsVideo at link. If you find direct video link please post - I'm at work so I don't have time to search.