April 2, 2007 - The remains of two more victims of 9/11 at the World Trade Center are positively identified. Of the 2,749 known deaths in the attacks in New York, 1,146 victims have yet to be linked to remains.

May 24, 2007 - The Chief Medical Examiner of New York City, Dr. Charles S. Hirsch, rules that the death of Felicia Dunn-Jones in 2002, from dust exposure, is directly linked to the 9/11 attack and therefore a homicide. This raises the 9/11 death toll to 2,750.

July 19, 2007 - The New York Medical Examiner's office announces that the remains of three more people are positively identified. 1,133 victims, 41 percent of the total, remain unidentified.

April 7, 2008 - The New York City Medical Examiner's Office announces that the remains of four more victims from the WTC have been identified. As of this date, 1,621 victims have been identified, leaving 1,129 unidentified.

January 2009 - The medical examiner's office rules that Leon Heyward, who died the previous year of lymphoma and lung disease, is a homicide victim because he was caught in the toxic dust cloud just after the towers collapsed. This brings the total number of 9/11 victim death toll to 2,752.

June 17, 2011 - The New York medical examiner rules that Jerry Borg's death on Dec. 15, 2010 is a result of inhaling toxic substances from the dust cloud generated by the collapsing twin towers. This brings the number of victims at the World Trade Center site to 2,753 and the overall 9/11 victim death toll to 2,977.

Aug. 23, 2011 - The New York City Medical Examiner's office announces that remains from the World Trade Center have been positively identified as 40-year-old Ernest James. As of this date, 1,632 victims have been identified, leaving as many as 1,121 unidentified.

Feb. 10, 2012 - The New York City Chief Medical Examiner's office announces that remains from the World Trade Center have been positively identified as 42-year-old Karol Ann Keasler. As of this date, 1,633 victims have been identified, leaving as many as 1,120 unidentified.

July 5, 2013 - Remains are identified as firefighter Lt. Jeffrey P. Waltz, who was last seen in the north tower of the WTC.

Victim Compensation Fund:

Operates from December 2001 to 2003.

The Victim Compensation Fund receives 7,408 applications for both death claims and personal injury claims.

The fund makes awards in 5,560 of those cases.

Jan. 2, 2011 - President Barack Obama signs James Zadroga 9/11 Health and Compensation Act of 2010, reopening and expanding the scope of the VCF.

Economic Impact:

$500,000 - Estimated amount of money it cost to plan and execute the 9/11 attacks.

$123 billion - Estimated economic loss during the first 2-4 weeks after the World Trade Center towers collapsed in New York City, as well as decline in airline travel over next few years

$60 billion - Estimated cost of the WTC site damage, including damage to surrounding buildings, infrastructure and subway facilities.

$40 billion - Value of the emergency anti-terrorism package approved by the U.S. Congress on Sept. 14, 2001.

$15 billion - Aid package passed by Congress to bail out the airlines.