This year marks 15 years since the terrorist attacks of Sept. 11, 2001.
Days the New York Stock Exchange was closed due to the attacks.
Percentage of Americans who knew someone hurt or killed in the attacks.
Number of New York Police Department officers killed.
Number of Port Authority police officers killed.
Number of days fires continued to burn after the attack.
Number of nations whose citizens were killed in the attacks.
Number of World Trade Center companies in the towers that lost people.
Number of firefighters and paramedics killed.
Number of people who lost a spouse or partner in the attacks.
Total number killed in attacks in New York.
Estimated number of children who lost a parent.
Number of jobs lost in New York owing to the attacks.
Estimated number of New Yorkers suffering from post-traumatic-stress disorder as a result of 9/11.
Tons of debris removed from site.
Estimated cost of cleanup.
Estimated amount donated to 9/11 charities.
Economic loss to New York in month following the attacks.
Source: New York magazine