World Trade Center (1973–2001)
In the immediate aftermath of the attacks, media reports suggested that tens of thousands might have been killed in the attacks, as over 50,000 people could be inside the World Trade Center, although the National Institute of Standards and Technology (NIST) estimated that approximately 17,400 occupants were in the towers at the time of the attacks. Ultimately, 2,753 death certificates (excluding those for hijackers) were filed relating to the 9/11 attacks in New York City, including one filed for Felicia Dunn-Jones, who was added to the official death toll in ; Dunn-Jones died five months later from a lung condition linked to exposure to dust during the collapse of the World Trade Center. Three other victims were then added to the official death toll by the city medical examiner's office: Dr. Sneha Anne Philip, who was last seen the day before the attacks; Leon Heyward, a man who developed lymphoma and subsequently died in 2008 as a result of dust ingestion during the events following the attacks to the Twin Towers; and Jerry Borg, who died in December 2010 of pulmonary sarcoidosis determined in June 2011 to be the result of dust from the attacks. 2,192 civilians died in and around the World Trade Center, including 658 employees of Cantor Fitzgerald L.P. (an investment bank on the 101st–105th floors of One World Trade Center), 295 employees of Marsh & McLennan Companies (which was located immediately below Cantor Fitzgerald on floors 93–101, the location of Flight 11's impact), and 175 employees of Aon Corporation. In addition to the civilian deaths, 343 New York City Fire Department (FDNY) firefighters were killed in the attacks, as well as 71 law enforcement officers, including 37 members of the Port Authority Police Department (PAPD) and 23 members of the New York City Police Department (NYPD). Ten years after the attacks, remains of only 1,629 victims had been identified. Of all the people who were still in the towers when they collapsed, only 20 were pulled out alive.
Empty Sky (memorial)
The design was chosen by unanimous vote of the Families and Survivors Memorial Committee, out of 320 qualified entries in the international design competition. The memorial is dedicated to 746 New Jerseyans killed in the World Trade Center in 1993 and in the September 11 attacks, as well as those who died on September 11, 2001, at the Pentagon and in Shanksville, Pennsylvania. The New Jersey 9/11 Memorial Foundation has stated that the goal of this memorial is to "reflect the legacies of those whose lives were lost, that their unfulfilled dreams and hopes may result in a better future for society. Their unique qualities and characteristics enriched our lives immeasurably and through this memorial, their stories live on.
The memorial includes twin walls, transecting a "gently sloped mound anchored by a granite path that is directed toward Ground Zero. Two -high rectangular towers stretch long—the exact width of the World Trade Center towers, the proportion of the walls a symbolic representation of the buildings as if they were lying on their sides. The name of each of the 746 victims is etched in stainless steel in letters. A granite passage is oriented to face the site of the twin towers. The name of the memorial is taken from the Bruce Springsteen song "Empty Sky", which is about the "empty sky" where the towers once stood.