Det. Greg Semendinger/NYC Police Aviation Unit
  • NYPD World Trade Center 9/11 Aerials

    Looking at these images never gets any easier. The photos that follow depict the horrible images of the September 11, 2001 attacks and the aftermath of the recovery efforts where some 2800 innocent people died, including those aboard hijacked flights American 11 and United 175. ABC News obtained these images after filing a Freedom of Information Act request in 2009 with the National Institute of Standards and Technology, which had collected as part of an investigation into the collapse of the World Trade Center.
    Det. Greg Semendinger/NYC Police Aviation Unit
  • NYPD World Trade Center 9/11 Aerials

    In August ABC News saw that the NIST was asking various photographers for permission to release images they collected from the investigation, completed in 2005, into the collapse of the World Trade Centers. NIST was asking amateur, professional and freelance photographers whether the release of the pictures would be objectionable to them.
    Det. Greg Semendinger/NYC Police Aviation Unit
  • NYPD World Trade Center 9/11 Aerials

    Seeing the request in the Federal Register, ABC News filed a Freedom of Information Act request on August 14, 2009 to obtain the volumes of pictures and video that NIST had collected. After months of review and collection by NIST, ABC News was provided with 2,779 pictures on nine CDs.
    Det. Greg Semendinger/NYC Police Aviation Unit
  • NYPD World Trade Center 9/11 Aerials

    Featured in this slide show is a select group from the thousands of images provided to ABC News. Some of the pictures have never been released before, such as this one taken from NYPD Helicopters showing the vast size of the dust cloud generated when the towers collapsed.
    Det. Greg Semendinger/NYC Police Aviation Unit
  • NYPD World Trade Center 9/11 Aerials

    The dust-and-debris cloud settles over lower Manhattan after the collapse of the second World Trade Center tower.
    Det. Greg Semendinger/NYC Police Aviation Unit
  • NYPD World Trade Center 9/11 Aerials

    Thick plumes of smoke and debris envelop the World Trade Center after the first tower collapses.
    Det. Greg Semendinger/NYC Police Aviation Unit
  • NYPD World Trade Center 9/11 Aerials

    Hundreds of emergency first responders and good samaritans rushed towards the site of the collapse after the attacks, assisting in rescue efforts beneath the billowing clouds of debris.
    Det. Greg Semendinger/NYC Police Aviation Unit
  • NYPD World Trade Center 9/11 Aerials

    NYPD World Trade Center 9/11 Aerials
    Det. Greg Semendinger/NYC Police Aviation Unit
  • NYPD World Trade Center 9/11 Aerials

    Devastation of the World Trade Center could be seen from across the Upper Bay, in New Jersey.
    Det. Greg Semendinger/NYC Police Aviation Unit
  • NYPD World Trade Center 9/11 Aerials

    One and Two World Trade Center buildings collapsed within 30 minutes each other; Seven World Trade Center collapsed later that afternoon.
    Det. Greg Semendinger/NYC Police Aviation Unit
  • NYPD World Trade Center 9/11 Aerials

    2,975 men, women and children died in the September 11 terrorist attacks at the World Trade Center, Pennsylvania and Virginia.
    Det. Greg Semendinger/NYC Police Aviation Unit
  • NYPD World Trade Center 9/11 Aerials

    2,752 men, women and children died at the World Trade Center alone on September 11.
    Det. Greg Semendinger/NYC Police Aviation Unit
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