In this Sept. 11, 2001, photo made by the New York City Police Department and provided by ABC News on Tuesday, Feb. 9, 2010, smoke and ash rise above downtown high-rise buildings and engulf lower Manhattan after terrorists flew two airliners into the World Trade Center towers. The new views of the terrorist attacks - one of the most recorded events of all time - add to the hundreds of hours of amateur videos, images and stories gathered by the foundation building the memorial at ground zero.
Credit: AP Photo/NYPD via ABC News, Det. Greg Semendinger
In this Sept. 11, 2001, photo made by the New York City Police Department and provided by ABC News on Tuesday, Feb. 9, 2010, a World Trade Center tower implodes in New York, after terrorists flew two airliners into the towers. Many of the photos, taken from police helicopters, have never been released before.
Credit: AP Photo/NYPD via ABC News, Det. Greg Semendinger
In this Sept. 11, 2001 photo made by the New York City Police Department and provided by ABC News on Tuesday, Feb. 9, 2010, smoke billows from the grounds of World Trade Center in New York after terrorists flew two airliners into the towers.Read more
Credit: AP Photo/NYPD via ABC News, Det. Greg Semendinger
In this Sept. 11, 2001, photo made by the New York City Police Department and provided by ABC News on Tuesday, Feb. 9, 2010, smoke billows from the grounds of World Trade Center in New York after terrorists flew two airliners into the towers. Read more
Credit: AP Photo/NYPD via ABC News, Det. Greg Semendinger
In this Sept. 11, 2001, photo made the the New York City Police Department and provided by ABC News on Tuesday, Feb. 9, 2010, the upper floors of the World Trade Center tower burns after terrorists flew an airliner into it.Read more
Credit: AP Photo/NYPD via ABC News, Det. Greg Semendinger
In this Sept. 11, 2001, photo made by the New York City Police Department and provided by ABC News on Tuesday, Feb. 9, 2010, smoke and ash rise as a World Trade Center tower burns at left center, after terrorists flew two airliners into the World Trade Center towers. Read more
Credit: AP Photo/NYPD via ABC News, Det. Greg Semendinger
In this Sept. 11, 2001, photo made by the New York City Police Department and provided by ABC News on Tuesday, Feb. 9, 2010, smoke billows from the grounds of World Trade Center in New York after terrorists flew two airliners into the towers. Read more
Credit: AP Photo/NYPD via ABC News, Det. Greg Semendinger
In this Sept. 11, 2001 photo made by the New York City Police Department and provided by ABC News Tuesday Feb. 9, 2010, shows a close-up of the upper floors of a World Trade Center tower in New York, after terrorists flew two airliners into the towers. Read more
Credit: AP Photo/NYPD via ABC News, Det. Greg Semendinger
In this Sept. 11, 2001 photo made by the New York City Police Department and provided by ABC News on Tuesday, Feb. 9, 2010, smoke billows from the grounds of World Trade Center in New York after terrorists flew two airliners into the towers.
Read more
Credit: AP Photo/NYPD via ABC News, Det. Greg Semendinger
In this Sept. 11, 2001 photo made by the New York City Police Department and provided by ABC News Tuesday Feb. 9. 2010, smoke and ash engulf the general area of the World Trade Center in New York after terrorists flew two airliners into the towers. Many of the photos, taken from police helicopters, have never been released before.Read more
Credit: AP Photo/NYPD via ABC News, Det. Greg Semendinger
In this Sept. 11, 2001, photo made by the New York City Police Department and provided by ABC News on Tuesday Feb. 9, 2010, smoke and ash engulf lower Manhattan after terrorists flew two airliners into the World trade Center towers. The photos were obtained by ABC News, which filed a Freedom of Information Act request with the National Institute of Standards and Technology last year. The NIST collected the images as part of its investigation into the terrorist attack.Read more
Credit: AP Photo/NYPD via ABC News, Det. Greg Semendinger
In this Sept. 11, 2001, photo made by the New York City Police Department and provided by ABC News on Tuesday, Feb. 9. 2010, smoke and ash engulf the general area of the World Trade Center in New York after terrorists flew two airliners into the towers. Read more
Credit: AP Photo/NYPD via ABC News, Det. Greg Semendinger
In this Sept. 11, 2001, photo made by the New York City Police Department and provided by ABC News on Tuesday, Feb. 9, 2010, smoke and ash rise as a World Trade Center tower burns at left center, after terrorists flew two airliners into the World Trade Center towers. Read more
Credit: AP Photo/NYPD via ABC News, Det. Greg Semendinger
