Keywords: September 17 2001 Ground Zero 04.jpg Edificios alrededor del World Trade Center seriamente dañados por la caída de las torres gemelas Ground Zero New York City N Y Sept 17 2001 -- An aerial view shows only a small portion of the crime scene where the World Trade Center collapsed following the Sept 11 terrorist attack Surrounding buildings were heavily damaged by the debris and massive force of the falling twin towers Clean-up efforts continued for months http //www navy mil/view_image asp id 2506 U S Navy photo by Chief Photographer's Mate Eric J Tilford 2001-09-17 PD-USGov-Military-Navy 010917-N-7479T-513 Navy http //www navy mil/view_image asp id 2506 Ground Zero World Trade Center in September 2001 September 2001 photographs Photographs of flags of the United States at Ground Zero World Trade Center Aerial photographs of Ground Zero World Trade Center |