All of us remember exactly what you were doing when you heard the towers were hit.  I can still remember the way the room smelled that I was in.  It was a terrifying day and I remember I called both of my parents and told them how much I loved them.  It really rocked my world and it still does.  After the jump there's a video that was just released and it's still hard to watch.

This video shows the second tower, not long after it was hit on September 11th, 2001.   You can see and hear as an NYPD helicopter flew over both towers and got footage of the smoke pouring out. Then after the first tower fell, they got footage from above the toxic dust filling the streets of Lower Manhattan.

The 17-minute video was obtained by the National Institute of Standards and Technology, to help with their ongoing investigation. But now the entire thing is on YouTube because someone leaked it and the video is below: