395085 01: Pedestrians near "ground zero" view photos September 28, 2001 of police and fire personnel missing since the World Trade Center attack Septmeber 11 in New York City. (Photo by Mario Tama/Getty Images)
394392 13: The wreckage of the World Trade Center is visible through the broken window of an apartment building near the wreckage September 13, 2001 in New York City, two days after two airplanes slammed into the twin towers September 11, 2001 in an alleged terrorist attack. (Photo by Mario Tama/Getty Images)
394742 13: (FILE PHOTO) Smoke rises from the site of the World Trade Center terrorist attack September 19, 2001 in New York City. Rescue and recovery work continues September 20, 2001 but hopes of finding survivors are fading. (Pool photo courtesy of NYC Office Of Emergency Management/Getty Images)
394261 14: A fiery blasts rocks the World Trade Center after being hit by two planes September 11, 2001 in New York City. (Photo by Spencer Platt/Getty Images)
NEW YORK - SEPTEMBER 11, 2001: (SEPTEMBER 11 RETROSPECTIVE) A firefighter breaks down after the World Trade Center buildings collapsed September 11, 2001 after two hijacked airplanes slammed into the twin towers in a terrorist attack. (Photo by Mario Tama/Getty Images)
