A new 17-minute video of the twin towers after they were hit on Sept. 11, 2001, taken from aboard a New York Police Department helicopter, shows thick, black smoke billowing out into the Lower Manhattan sky.
The video was posted by the website Cryptome, which says it publishes documents that are "open, secret and classified." In posting the video on YouTube, the group said the video was provided by NYPD to the National Institute of Standards and Technology for its trade center investigation.
At another point, a voice says: "That's it. The biggest disaster in the world."
The video is shot through the cockpit windows and the chopper's side windows. The back of a man's jacket reads "NYPD Emergency Services." The helicopter, shown on the ground at one point, is marked "NYPD Air Sea Rescue."
There isn't much dialogue on the video, mostly the steady whir of the rotor blades as the smoke pours out. The attacks, the worst case of terrorism on U.S. soil, killed nearly 3,000 people at the twin towers and in plane crashes into the Pentagon and in a western Pennsylvania field.