394263 12: (PUERTO RICO OUT) Firefighters walk towards one of the tower at the World Trade Center before it collapsed after a plane hit the building September 11, 2001 in New York City. (Photo by Jose Jimenez/Primera Hora/Getty Images)
394261 115: People walk in the street in the area where the World Trade Center buildings collapsed September 11, 2001 after two airplanes slammed into the twin towers in a suspected terrorist attack. (Photo by Mario Tama/Getty Images)
NEW YORK - SEPTEMBER 13, 2001: (SEPTEMBER 11 RETROSPECTIVE) Rescue workers sift through the wreckage of the World Trade Center September 13, 2001 in New York City, two days after two hijacked airplanes slammed into the twin towers, levelling them in an alleged terrorist attack. (Photo by Mario Tama/Getty Images)
394263 07: (PUERTO RICO OUT) People hang from windows of World Trade Center after two hijacked passenger planes hit the building September 11, 2001 in New York City in an alleged terrorist attack. (Photo by Jose Jimenez/Primera Hora/Getty Images)
394392 11: 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)
